The CDN is having some problems. They're working on it, I'm not sure when it'll be resolved. This means some people in certain locations won't be able to update. The only affected place I know of so far is the Netherlands region, but might affect others too. When the new development system is up I'll add a fix so this won't happen again, but for now you'll have to do a "manual" update if you wanna be able to play.. :)
To do a manual update:
https://projectrik.com/install/
- Download RIK.exe and Data/*.zip from there, and extract them to replace the files you currently have.
- Edit Programs/version and change the number to 1224
- Paste the contents of this file into Programs/local and Programs/version
- At this point you should be able to run it like usual.