how to fix and how debug the below error. I am getting this issue when I opened any customer it’s showing not continuously sometimes it happens.
A technical problem with the server created an error. Try again to
continue what you were doing. If the problem persists, try again
later.
I have tried already to change the user password, check the index.php for any echo code, tried also to upgrade, compile, deploy, reindex, and clean the cache, but nothing, I still get this error.
