Ive got the same issue here in the UK.Deleted cookies,cleared cache etc.Tried different browsers and devices but no go.I submitted a support ticket but just wondered if anybody else in the UK has the same issue.
Same thing with me here. Iâm in Ireland.
Hello from Mexico. The browser is no longer displaying the error it was showing previously; now it acts as if itâs loadingâthough in reality it shows nothingâand the entire page remains black. This is happening at 2:18 AM.
As a last resort i rebooted my router but still the black screen.I tried it using Edge on my xbox but still nothing.Slightly annoying but i assume they will sort it sooner or later.
Same 500 problem from Czech. 
Realistically, this issue is only going to get fixed on Monday
I dont expect anything to happen over the weekend,in any case i can still access online gaming but not all parts of forza.net 
I believe an element of the issue is that users can see the forums but not any urls on forza.net, but if there are some urls that are visible and others that are not, it may help the team if users list them.
no forza.net URL linked in the header is loading, all throw the 500 error
This
No url for me,just a black screen.No issues getting onto the forums through my bookmarks but not able to access them via forzs.net,as i cant enter forza.net.
Tried different browsers,vpn and devices but its a no show for me in the UK.I can access forza support but i dont know if thats part of forza.net
Hello. i am from portugal and i have the same issue. i cant enter on forza.net
Error 500 here as well, FireFox from Poland
Same issue in Sweden, page is just blank.
Website www.forza.net is blank.
Forum Forza view normal.
Been trying to access forza gallery but screens just blank
Please try refreshing your browser periodically over the next half hour to let us know if you see any improvements.
looking good right now from my side aswell!