I found it.
Jetpack and mythemeshop-connect
both have to have .old to be able to work. What are my next steps to replace those or having work with my site?
Jackie, thank you very much.
the theme.old didn’t solve it but the content.old did. I tested each plugin like you suggested and they all work ok without the .old.
Now I need to check what other item is creating the conflict. Any suggestions?
THanks again
