Panel Error after Upgrade to 4.3

After upgrading to 4.3, I encountered a problem in the Panel on the test server. The issue doesn’t occur in the local setup.

Is anyone else experiencing this problem?

Problem:

Clicking on “System” results in the error message: Call to undefined method Kirby\Cms\System::info().

I checked the PHP error log, but found no entries.

Please make sure that the kirby/ folder is fully uploaded with the new version – the error message sounds like there might be files missing.

made a complete reset.
thanks for your help