Labels of all extjs buttons are invisible
when I try to delete an installed extension in extension manager then a dialog appears with two buttons. But there is no label "yes" and "no".
I have seen that you have renamed t3lib_l10n-folder to l10n in typo3temp/Cache/Data/. I have deleted this folder. But labels are still empty. Further I have removed this folder again and received all new languages from languageserver. Labels are still not there.
So, this is not a Cache thing. It's a bug
All extjs buttons are affected. The font-size is 0.