Mediawiki Vm Error

Hello guys, first i have to say thank you to Tom for sharing the Wiki Vm.
Now, i am using proxmox as my hypervisor, so i have to convert the vm from .Ova to qcow for proxmox , everthing works good, the only thing is when i changed the admin password on the wiki backend, it just go to a NOT FOUND Page error… i have to hit back on the browser and refrest to make work, but thats not acceptable i guess. any idea?