Export a HEVC H265 fails, special format 12032 px x 96 px at 60 fps, 20 secs

Hi everyone,

I'm facing an issue with exporting a sequence from After Effects. The requirement is to export it as an mp4 file without audio, using the H.265/HEVC codec. Additionally, the target size is 12032px x 96px, with a frame rate of 60 fps and a duration of 20 seconds, as it's intended for display on an LED strip. The predicted file size is around 20 MB, which is good.

However, every time I try to export the sequence, I encounter an error message:

Error during export Error compiling the film.

Here are the export details:

• Error during export
• Error compiling the film.

• Error during export

• Encoder could not be created.

• Writing with exporter: HEVC (H.265)
• Write to file: ....Final.mp4
• File type is written: HEVC
• To timecode: 00:00:00:00
• Component: HEVC (H.265) of type Exporter
• Selector: 9
• Error code: 3

Could the error be related to the size? Exporting at 12032px x 200px works fine, so I'm wondering if there's a minimum height requirement for HEVC encoding. 

I'm exporting using these specifications.

(Apologies for this being in German, but hopefully still understandable - I've blacked out some details, like the preview.)  

Any insights or suggestions would be greatly appreciated. Thanks!