I also experience the same @Netherlands. Edit: works again.

Based in the UK here.

I'm getting 504 Gateway Time-Out messages whenever I try to navigate to Rise whether through browser or Articulate's desktop launcher.

A colleague of mine is also seeing error 502 Bad Gateway.

Update 18/10/24 @ 10:16

I tried a simple restart and I'm back in Rise. Did not have to clear browser cache.

Same in Germany.

Cleared my cache and it seems to be OK now 

The same in Latvia.

Seems on and off - ok again now... I think!!