Since yesterday evening 6 of 7 of our magento shops in 1 installation give a time-out error on both front- and backend. Strange is that 1 subshop still works, all others are down. It is a time out out 500, internal server error.
Before, the sites were working well.
We have not worked in the site, and we have no clue where the issue is coming from. Hoster checked everything, no problems in hosting, we have even other magento stores in same server working still.
On the server I also have a tar file backup of alles files days ago, when it was still working, allthough re-installing that does not make the issue go away so far.
I am looking for someone with magento experience who can do a quick solution but ALSO explains the problem and think and inform us WHY the problem occurred. It should be 1-2 hours of work I think if you knwo what you are doing.