Ninja
The problem seems to be still alive. I migrated four sites from J 3.10 to J 4.2.6 with the latest T3 plugin during the last days. Now I encountered the following error during the last migration when calling the contact form from one of my contacts:
Fehler 0 Class 'ContactHelperRoute' not found
The problem seems to be purity III, because the problem doesn't show in Cassiopeia. When trying to look up the data of the colortheme in thememagic before deleting the template, I found thememagic missing.
Any date given for a solution?