Updating from 188.8.131.52 to 2.5.6 results in the following error:
gravityforms/gravityforms.phphas been deactivated due to an error: The plugin does not have a valid header.
On top of that, Gravity Forms disappears from the Plugins page. Only way to bring it back is to overwrite the plugin via FTP with the 184.108.40.206 version, which is the only older version I have on hand.
The site’s PHP was recently updated to 7.4, so that may be related.
Any ideas what may be causing this?