Media Encoder fails when Exporting MPEG2 from AfterEffects Error Code 19

I recently upgraded from CC2017 to CC2018 on both my PC at work and my Mac at home. When I was using CC2017 encoding 1920x755 (for digital signage) worked fine to a MPEG2 file. Today, I was trying to encode to a MPEG2 file, and started getting this error below. It happens on both my Mac at home and PC at work.

I can get a 1920x1080 to encode, (1920x754 and 1920x756 both encode ok), the size I need to export for digital signage is 1920x755.

Is there somewhere I can find what frame size is supported by MPEG2 codec?

I feel like I've eliminated "hardware or memory problems"

Things I've tried so far:

- Uninstalled and reinstalled Media Encoder latest version (kept preferences from old CC2017 and also deleted preferences)

- Cleared all my media caches

- Restarted

- Updated video card drivers

- Tried a new simple AE project

- Encoding Time: 00:00:02

08/27/2018 04:58:33 PM : Encoding Failed

------------------------------------------------------------

Export Error

Error compiling movie.

Codec compression error.

This codec may be unable to support the requested frame size, or there may be a hardware or memory problem.

Error completing render.

Writing with exporter: MPEG2

Writing to file: /Volumes/SubSSD/Decode_video/1 - Resources/1 - Footage/2 - Exports/Comp 1.mpg

Writing file type: mpg2

Around timecode: 00:00:00:01 - 00:00:01:08

Component: MPEG2 of type Exporter

Selector: 9

Error code: 19

------------------------------------------------------------