Currently, if you subscribe to a list to which you were already subscribed an error is shown.
This isn't ideal from a UI perspective + it allows people to check which email addresses are subscribed to your list.

I would suggest to show a success message anyhow in case subscription failed due to this reason.

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Start within a Git clone of the project using the version control instructions.

Or, if you do not have SSH keys set up on git.drupalcode.org:

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matthijs created an issue. See original summary.

matthijs’s picture

Status: Active » Needs review

I created an MR with first attempt to get this fixed.

Further enhancements are probably required, but the code is rather all over the place so it will need a full cleanup.