Hmm. Can you confirm that the user is logged in? Also, check your permissions to see if comment permission is open to anyone.
Yes the user is logged in and also the permission is not open to everyone.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Is the comment added by a plugin? Or by the user on the UI? If it is the user, are there any error in the logs when the comment is added?
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Comment is added by the user on the UI. And also I haven't seen the logs while user added the comment.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You need to check the logs while reproducing the issue. There has to be some changes in the system as this is not a normal behavior.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Also, which version of JIRA?
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.