Is the problem that the keyframes are no longer visible, or that nothing happens when you click on them to select them, or something else?

[quote user="BurghMD"]They are linked.[/quote] Does playback improve if you transcode them?

What specific version of Media Composer and the macOS are you running? Are the music tracks linked only, transcoded, or imported? What format is the project? Where are the original files stored (what kind of hard drive, how is it connected) and if you've transcoded or imported them what resolution did you use?

What format/frame rate is the project and what format/frame rate are the clips? How is the media coming in to the system? Is it linked or transcoded? If transcoded, to what resolution? Network or local storage? What are the system specs of the computers?

Thank you for replying with the answer!

Hi, See if this helps: https://avid.secure.force.com/pkb/articles/en_US/Error_Message/EssentialResourceNotAvailableError-Launching-Media-Composer-2022-4

[quote user="FilmStudent007"]under the "Plug-in" drop bar, it says that all files "Can't be linked."[/quote] If you click on the plug-in column in the source browser, are there any other choices available?

This is a friendly reminder that we're all professional editors, and we try to keep our discussions professional as well. As long as everyone's posts follow the terms of use you agreed to when you signed up, nobody gets to tell anyone else what or what not to post. Be nice.

What specific version of Media Composer on what specific macOS? Don't work how? Are you trying to import them or link them? What happens when you try?

Thank you kindly for posting the solution!