Trust.Zone vs Mullvad VPN

Talking about Express and others, Mullvad have the best speed during my personal experience. (I tried paid subscription to Ghost, Express, ProtonVPN and Nord.)

I am not sure how to fix this. I've been using Mullvad for a few years and never had a leak when using the app. I just changed computers and installed the app and got this leak result. Is there anything I should do? I tried to do an internet search to fix this and I simply get confused reading all the "DNS speak" that is all over the internet- I just don't understand it which is why I purchased a VPN service with an app that is just supposed to work

Don't trust forks much, As i rather put my data with firefox plus mullvad vpn works with them on their vpn service. And mullvad is a really good privacy vpn..