Now I disabled this MU-Plugin and the form works. Hooray! Thank you very much!
They write about some MU-Plugin. And yes, we do use the 1&1 Ionos Server. Now I’ve found it on the ftp data structure in the wp-content folder. Is it enough to rename the mu-plugins folder?
Btw, all of the folders there are twice duplicated with the name additions “-old” and “-old-old”, what is this?
Hi Long Nguyen,
thanx for the advice. I’ve just written there, too. 😉
