Thanks for your kindness and patience with me. I now see that I made a copy of the plugins folder on the site through ftp (called ftp1) could that be the issue? It seems that the plugins that could not be activated are also quite random, I was able to activate others after yours!
Ronald
There are maybe 25 plugins on there, and it was not overloaded before upgrading to 3.8. So that does not seem to be the issue.
Thanks for the quick response! When I try to delete it from the plugin list, this is what I get:
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 122880 bytes) in /public/sites/www.maquillagepermanentparis.eu/wp-admin/includes/class-wp-upgrader.php on line 2259
Hope this helps
Ronald