lock out of my network site, but don't know why?

Hey there team thanks for great support!

please try to help here with understanding this issue:

During configuration of the bestpages.co.il and few sub sites i got locked out of the network.

I have configure the map domain and afterword i successfuly configure few more themes and work for 10-20 min.

Suddenly the system threw me out and didn't gave me permission to access the network, I have checked other sites i own in the server but all OK. I also called to my hosting support but they didn't understand the reason, i think it something with the setup, i am getting the site up again with the backup file from the morning BUT i am really don't want this to happen again, Please try help my figure what may cause this to happen.

thank you