ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 27, -14, 43, 41, 12642772, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", "U")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 27, -1, 68, 53, 12642772, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", "M")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 22, -10, 96, 57, 12642772, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", "f")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 34, -6, 123, 41, 12642772, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", "N")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 29, 5, 159, 45, 12642772, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", "7")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 20, 2, 183, 51, 12642772, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", "5")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
ojs2 has produced an error
  Message: WARNING: Cannot modify header information - headers already sent by (output started at /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php:381)
  In file: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 113
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "Cannot modify header information - headers already sent by (output started at /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php:381)", "/home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php", 113, Array(13))
   File: /home/ojs2/ojs2/lib/pkp/classes/captcha/CaptchaManager.inc.php line 113
     Function: header("Content-type: image/png")
   File: /home/ojs2/ojs2/pages/user/UserHandler.inc.php line 487
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: UserHandler->viewCaptcha(Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /home/ojs2/ojs2/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /home/ojs2/ojs2/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /home/ojs2/ojs2/index.php line 64
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-82+0~20250703.100+debian12~1.gbp3f56ba
   Apache Version: N/A
   DB Driver: mysql
   DB server version: 10.11.11-MariaDB-0+deb12u1<br/>
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