Klassiekerrally

Works like a dream, thanks!

Not yet, because everything worked fine before scaling…
I’ll give it a try and let you know if it works for me.

WordPress Database Backup also gave a problem… I’ll try updating them and see what happens.

Your solution works for me, NielsT. First rename the plugin directory, login to the back end of the website, change the name of the plugin directory back to what it was original.
Then one by one re-activate the plugins, so you can see what plugins cause the problem. In my case ‘Alkivia open community’ was one of them.