Exporting/Encoding Video Crashes My Computer

Hello,
 
Everytime I compress/export a video longer than about 20min (estimated file size > ~1GB) either my Adobe program crashes, or my entire computer crashes (turns off without warning and reboots). It happens when I either encode/export directly from Premiere, or send the video to Media Encoder, and happens about 2-5min into the encoding process. It's a new problem (both programs were working fine until last week).

 
Some more info:
• 2017 MacBookLaptop running MacOS Catalina 10.15.7
• GPU Intel HD Graphics 630 1536 MB
• Premiere Pro v. 15.4.1 (build 6), Media Encoder v 15.4.1 (build 5)

• Error message recorded by in the "AMEEndcodingErrorLog" when it crashes the Adobe program but not my entire cpu:
" --------Encoding Time: 00:01:46
10/18/2021 09:25:58 PM : Encoding Failed
--

Export Error


Error compiling movie.


Export Error


Error completing render.


Writing with exporter: H.264


Writing to file: /Volumes/     [...I'll keep the file path hidden for now but can share it if it's needed]


Writing file type: H264


Around timecode: 00:11:23:11 - 00:11:23:20


Component: H.264 of type Exporter


Selector: 9


Error code: -2147483648
 

"

• There is also a much larger crash detail that pops up when my whole cpu crashes, I can include it if needed.

Some things I've tried already that haven't fixed the problem:

• Updated Adobe programs
• Tested multiple video resolutions and file types (for both the source and output settings).
• Cleaned the Me and Pr Media Caches
• Moved the project off an external hard drive to my cpu's HD (in case the external HD was the problem)

This problem has basically shut down the work I wanted to do this entire week. Any suggestions would be greatly appreciated.

Thanks!
J