Great questions, Tom.
I meant to include the original question. Here it is: Mac Compressor shows 'Missing Plugin' and… - Apple Community
I will take that into consideration, regarding Chrome.
As far as the "missing plugin." There isn't any missing plugin. Originally, prior to finding the solution, I spent days trying to find the solution. The problem was that that red screen (frame) would show, with the verbiage, "missing plugin," but I hadn't used any plugins. For example, I would use a clip of film and simply send it to the Compressor.
And, good eye in catching the export vs send. I caught that as I was hitting "submit." I copied the original question exactly as it appears. But, for my purposes, I was using "Send to Compressor." And, the "missing plugin" screen shows even before it starts to process in Compressor. But, if the Final Cut Pro file is on the main drive, specifically, say, in the "movies" folder, that problem does not occur.
And, as I mentioned, it will say "missing plugin" even if you haven't done any editing to the film footage at all (e.g., have not used any plugins).
Many of the other solutions out there talk about finding the film footage and relinking the footage and it is true, this particular error occurs in those cases too. It also does occur when there is a missing plugin. But, this particular circumstance is NOT those two cicumstances. This particular error shows up in the compressor when the film footage is where it is supposed to be (no errors in Final Cut Pro) and there are no plugins being used and the error (actually an incorrect error for all intents and purposes) shows up in compressor.
This is also why it is difficult to find the solution. You need to wade through all of the other solutions, which are valid solutions, for the other two scenarios. This particular scenario is less common, and henceforther that much more frustrating because of the lack of solutions. It is the one referenced in the other question, link at the beginning of this reply.
Thanks, Tom.
-Deborah