Can't connect to my instance anymore

My instance https://us-west-1.console.aws.amazon.com/ec2/v2/home?region=us-west-1#InstanceDetails:instanceId=i-c6edef82 is not accessible using ssh anymore (was fine before). Restart doesn't help.
I assigned the role https://console.aws.amazon.com/iam/home?region=us-east-1#/roles/MySessionManagerInstanceProfile to it, but still can't connect using session manager. Can't use the serial console because I don't have a user with password.
Please help.

This is duplication of this message https://forums.aws.amazon.com/thread.jspa?threadID=342683&tstart=0 was created because I git error 500 from the forum backend when initially tried to post it, so I was not sure if it was posted successfully.

Edited by: D. Shultz on Jul 3, 2021 5:06 PM