Thanks for the answer.
I followed your advice and deleted the daext-autlolinks-manager folder. After that I could navigate to the wordpress admin pages and did a new installation of the plugin. It went OK, without errors, but when I try to activate it I get an error 500 and it does not activate.
So the situation now is that my site is working normally, except that I can’t active the daext-autlolinks-manager plugin.
I can only tell that the issue arised after I updated the plugin. I had been using it before without issues.