Couldn't lock the file.
Stack Trace:
File: /home/synerhn4/public_html/pms/lib/pkp/classes/scheduledTask/ScheduledTask.inc.php line 143
Function: ScheduledTask->addExecutionLogEntry("https://synergypublishers.com/pms")
File: /home/synerhn4/public_html/pms/lib/pkp/plugins/generic/acron/PKPAcronPlugin.inc.php line 257
Function: ScheduledTask->execute()
File: (unknown) line (unknown)
Function: PKPAcronPlugin->shutdownFunction()