Steps to reproduce the issue

Update a third party extension.
If the extension's update server is missing checksum data (sha256, sha384 and/or sha512), after install, a warning pops up:
No checksum found on the server.

This message 'scares' a lot of users and most don't understand what it means.
This should probably be 'rewritten' in a language everyone can understand, not only the developers.

Expected result

Users understand what is going on

Actual result

Users get confused about the message, if they are not developers