ChaosMU Guide - Problems to Connect
Probably you have some issue in your computer.
Our Files are 100% protected and some antivirus/defender may cause some issue because they 'cant read them'.
Please, do this tutorial and try to open again.
1st - disable your antivirus and win defender
2nd - download mu again (yes, need new download AFTER disable things...)
3rd - open mu via launcher and play =)
Remember, you have to do it EXACTLY as we say.
Your antivirus/defender probably deleted some files during download.
Thats why you need disable them BEFORE download again, and thats why you need download again.
If problem still, contact is via facebook page.