I have a wallet problem. It says it's 90 weeks behind, and on the bottom it says "No block source available"

I didn't see anything in the wallet which shows any sort of url to modify/update which I am able to change? Is that something we should be changing? One of the previous replies mentioned this site:
https://prohashing.com/explorer/Fedoracoin/

However, I'm not sure what that site would do for my wallet?

Any help/advice is appreciated.

Thanks.