I am using GoMule R5.10 and playing on the recent 3.3 patch. GoMule shows "Disconnected" if characters hold an unidentified "Eligible for Chronicle" item in either inventory or stash. This wasn't a problem in 3.2. Dead hardcore characters won't load either, though this might be intentional.
Could you try this in the latest version? I'm curious if it fixed it - if not please email an example character to silopsen@silospen.com. Thank you!