lf-axentia

Is retract settings really in play here or is it in combing mode? Check "Travel->Combing mode"

There is a recently created issue (4.11.0) Cannot add cloud printer Ultimaker/Cura#10468 on github concerning this matter.

I have the same problem. One of my cloud printers (S3) are missing in Cura 4.11.0. Two printers (S5 and S3) visible in Digital factory, Cura 4.10.0 and Cura Arachne beta from the same computer. I don't think its about firewall or antivirus. It is time to create an issue on Github. Do you want to take the credits @lukask or should I write the issue?

I have the same problem on 4.9.1. Most plugins are missing in Marketplace when signed in but visible and installabel when signed out. After installation and sign in plugins are still available in Cura but again missing in Marketplace. I don't know if my account is associated with any older versions of Cura. I found no means of signing out all (lost) instances. Changing password didn't the trick.