When accessing user home- journal management- system plugins it gets error 500
When encountering an 500 error, consult your webserver’s error log for more information. Post the error message from the log here if the issue remains unclear.
For example, in Apache under RHEL, the default location of the error log would be /var/log/httpd/error_log. If hosted via CPANEL, there is a link “Error Log” in the “Logs” section of the administration screen. Your actually log location will vary.