plug-in issue in 10.3

I've been updating my libraries after upgrading to 10.3 and have had no issues until I updated a library with animations. I had received animations from an artist which for some reason came to me as text edits (not sure what her software was). The earlier version accepted them and I had no problem. Now that I've upgraded to 10.3, I open the project and all the animations have Missing Plug-in messages. I don't remember ever downloading a plug-in, so I don't really get why this is happening. I reopened the back-up project using the older version and everything is fine. Any ideas? thx

I get this from custom titles templates I had to update Motion. But, I've gotten it in 2 other Events. Nothing is missing, but I get the exclamation mark icon. I think it is a bug. Feedback form...

I'll do that. It's an archived project so here's hoping I don't get a call from the client wanting "one little change". Thanks.