Website access through wifi

I have a issue. After updating to Ubuntu 17.10 i cant access my uni website through any wifi , while with wire connection it works perfectly. I tried to ping and resolve with systemd-resolve but didnt get anything. Output was:

systemd-resolve online.manchester.ac.uk
online.manchester.ac.uk: resolve call failed: Received invalid reply

I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the https://community.ubuntu.com/t/finding-help/712 page.