Checking Jira Logs

Jira keeps it's logs inside atlassian-jira.log file. When this file reaches a certain size it backed up as atlassian-jira.log.1 and Jira continues to write new logs to atlassian-jira.log. For new administrators location of this file may be confusing because they search this file in JIRA_INSTALL_DIR instead of JIRA_DATA_DIR. It is located in JIRA_DATA_DIR/log folder. To see exact location of this file you can check "System Info" page of Jira. Login as administrator and navigate to "Administration/System/System Info" section. This page shows a lot of information about Jira such as how much memory it is using, listeners in the system or paths of some system files. By default Jira and add-ons only log error conditions in this file, for logging more detailed information you need to turn on logging of related package. 

Print Log File To Windows PowerShell

After entering the path of the atlassian-jira.log file in the windows PowerShell, you can use the command  'Get-Content atlassian-jira.log -Wait' to see logs in the file. All Jira logs will be written here.
Also, you can see the script's logs by configuring log levels of WorklogPro described in the page Configure Log Level of WorklogPRO-Timesheets for Jira to debug the script.