It looks like the Asterisk-IM plugin might be on the chopping block. It hasn't been updated or maintained in a very long time. Now, it appears that its causing issues with the latest version of openfire. I think this is an important plugin, and one worth saving. Unfortunately, I'm not a coder so my help in this is limited.
If you know of anyone that has the ability/experience to help, please reach out to them! It would be greatly appreciated!