I have a similar issue to some others I have seen: I can Launch and access other areas of Pro but not headers or footers. If I look at the dev page there is a 500 error. Here is what I have tried based on other posts I read here
Turn off all plugins and turn them on one at a time
Shut down my computer and restarted
Gone onto the server (GoDaddy) file manager and checked permissions
Checked the error log of same (it was empty)
It was fine. And then it was not. The last thing I did before it went south was to edit an Email Form from Theme.co. Prior to that, I had edited a template for the converter.
I am at a loss. I will provide login info. Can you please have a look? Thank you very much for your help.