This is a general guide to help in troubleshooting generic issues including:
Below is not an all inclusive list. It's recommended to search based on your specific error/issue/symptom as well, but if nothing is found, these are some general troubleshooting steps that can help.
Try with another browser/workstation first to see if it's browser/workstation specific
Use this mode to check for problem extension. If the issue doesn't happening in this mode, it indicates an issue with a browser extension.
Run with browser's Safe Mode / No Add-on modes to see if something additional connected to the browser is causing an issue.
Review the app-ca.logs for any warnings/errors / enable additional debugging
Enable developer tools to see if any information displays to help point to root cause
If yes, test with out of the box theme to see if that works, at least for short term
If you are seeing one of the below errors, click on the applicable KB below: