Server is a Apache 2.4 with php7 and I updated from 12.0.2 to 12.0.3RC2 and now i got:
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] => Array
[FILE_MISSING] => Array
[.gitignore] => Array
[expected] => 2ebfa9d965d970eb2f3356f80cbff785c90c9a0d7634b406e49cd4e311826eb4abb482d8be75557cff491837881af2795fc4bd3a8e8d42b24c56d3b53b9b5dee
I used the web-updater, that run through.