Update 12.0.2 -> 12.0.3RC2 -> Code integrity error

Server is a Apache 2.4 with php7 and I updated from 12.0.2 to 12.0.3RC2 and now i got:

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

- calendar
		- .gitignore

Raw output
    [calendar] => Array
            [FILE_MISSING] => Array
                    [.gitignore] => Array
                            [expected] => 2ebfa9d965d970eb2f3356f80cbff785c90c9a0d7634b406e49cd4e311826eb4abb482d8be75557cff491837881af2795fc4bd3a8e8d42b24c56d3b53b9b5dee
                            [current] => 




I used the web-updater, that run through.

Got the same error, also by running the web-updater.

Known issue, calendar maintainer is on vacation and needs to push a fixed release