Im was happily coding away until Cursor informed me of a update. So it installed 2.3.15 after that Cursor Agent was completely bricked. None of the agents would work, all checks are OK.
DO NOT INSTALL 2.3.15 !!!
If you did, download 2.2.44 from the download site and install over the existing install, no need to uninstall first.
DO NOT INSTALL ANY UPDATES and disable AUTO Updates via: How do I prevent automatic updating? - #8 by minemindmedia
It seems to work for me or saved me at least.
Greetz