What a great support.
That resolved the problem which I had.
Thank you again @tobiasbg
Hello again, yes, we have:
all-in-one-seo-pack, really-simple-ssl, updraftplus, wordfence and jetpack. I am looking at them now.
Hi @tobiasbg thank you so much for getting back so quickly. I have the feeling that the class had been loaded and the setClassMapAuthoritative is just not there. I am going to find out more.
I did download a fresh plugin folder and installed it but it made no difference. Thank you again and I will post my finding here.
