How to remove/solve "There were problems with the code integrity check. More information…"

Problem:

You’re getting a yellow “There were problems with the code integrity check. More information…” message within your WebGUI

Solution:

Please see the official documentation about code signing available here:

https://doc.owncloud.org/server/9.1/admin_manual/issues/code_signing.html#fixing-invalid-code-integrity-messages

how to solve this issue.