Integrity check failed: richdocumentscode

Hello,
after online upgrade 21.0.7 >> 21.0.9 on shared web hosting system Collabora/ richdocumentscode reclaims red marked message:

Technical information
=====================
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix
them.

Results
=======
- __richdocumentscode
	- EXCEPTION
		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
		- Certificate is not valid for required scope. (Requested: __richdocumentscode, current: CN=richdocumentscode)

Raw output
==========
Array
(
    [__richdocumentscode] => Array
        (
            [EXCEPTION] => Array
                (
                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
                    [message] => Certificate is not valid for required scope. (Requested: __richdocumentscode, current: CN=richdocumentscode)
                )

        )

)

Collabora didn’t update itself because of the 256 Mb border, so i did update to actual version by copying richdocumentscode.tar.gz to app’s directory. Before doing so i did rename/ save original folder \richdocumentscode to __richdocumentscode

How to solve this issue?

Thanks and best regards!