I reinstalled perl/catalyst/formbuilder on a new machine (perl 5.38, May 2025)
Then i noticed that Formbuilder did not render the TT-Templates correct, it missed all the information I put into the .fb-Files.
Problem was the line 'charset: utf88'
After recognizing this line it lost the text in FormBuilder::SOURCE::File.pm in procedure 'parse' when trying to decode utf8.
Easiest fix is to not use the line 'charset: utf8' in your fb-Files I might look into File.pm at a lter time (no Promises though).