Thanks so much Michael, that worked.
Hi Jarlep,
Just to let you know: the same thing happened to me. Then I updated wordpress to the latest version, renamed my oxygen theme back to “oxygen” in FTP, and activated it again. Website back to normal running on oxygen.
Hope that helps,
Becky
Hmm, looks like it is up and running now. I updated WordPress and that seemed to solve the problem. Apologies. Hope this helps anyone else in the same position.