500 Internal Server Error

This usually indicates an application related issue. If your site is on custom bench group, then you can investigate the same with:

Checking bench logs (Option 1)

1. Go to your site's Bench Group dashboard and check Sites tab

1. Click on View Logs

1. Open web.error.log and scroll to bottom. You should be able to see the traceback:

In this example, the site can't connect to the database server. Restarting the database server might a solution here.

Using SSH Access (Option 2)

Alternatively, you can locate web.error.log after SSH Access. Please check the docs here

If you occasionally get a pop-up with the Internal Server Error message, it is likely that a background job is failing. In such cases, checking your Scheduled Job Log, Error Log and worker.err.log file should help.