I uploaded the new updated theme and deleted the old one. I work on the Child theme anyway. I didn’t do any changes to the Portfolio files, just worked on the Editor. I don’t mind so much if the Portfolio is a four columns or a three columns one. When it was created for the first time (3 columns), it worked. In the Editor i just replaced “See more…” with “mehr lesen…” which would be the German translation. And now there is only one column displayed with the error Text.