Hello,
Sorry to see you are having this issue. As per the report, it seems that something is preventing the package manger to start. We need more information in order to find the source of your problem.
Could you please provide the Editor.log and upm.log? You can find instructions on how to find them and upload them here: How to expedite support/help request in this forum?
Keep in mind that the logs are written every time there is a successful launch. If you run the diagnostic tool, the Package Manager will be ran, and upm.log will be written again, so please, don’t run run the Diagnostic tool before coping the log files.
Also, you can check out the pinned thread **READ ME FIRST** Troubleshooting connection/loading project issues with Package Manager for more information on how to resolve this.
Cheers,
Supi