Compressor 4.48 warning glitch crashing

Hi group, I have compressor 4.48 I have been working on a video for a month corporate and on export to compressor it has been crashing saying absolute frame or something like that. I've been testing the sections and found if my section has a speed change up or down next to clips that also have a speed change it crashes but only if it's part of the entire timeline. If I copy the smaller pieces, I can export them in compressor one workaround I had was to do this and then paste them into the timeline but all are on multicam tracks and I hate doing that in case of a change anyway, wanted to warn you in advance.

First, turn off background rendering, and delete all your render files, then re-launch.

What versions of macOS and FCP?

Hello,

osx 10.14.6
fcp 10.4.10
compressor 4.48
So far I deleted all the render files turned off the render in fcp and restarted but it crashed 5 min. ago. re-deleted again and deleted all the proxy and optimized media and restarted. Yesterday I ran techtool and defragmented the drive and thought that might do it...
I'm running a sandisk 900 external drive ssd and adata ssd for cache and two egpu rx580 and it's a drag... meaning the crashes.

Defraging drives is outdated and a waste of time, FYI.

How long is this timeline? What Mac are you on?

6 min mbp 2017 3.1 i7

Ben thank you for helping me btw.... Here's the error code Failed: Error: RenderFrameAt returned: 4 for absolute frame: 8155

In FCP set preferences to display frames. Go to frame 8155 and see what’s happening. You may need to cut a clip or replace it. Maybe optimizing will fix it. There’s a bad frame at that point. It probably isn’ta render files.