viseron: yuv420p & h264_nvmpi missing

I have a Jetson Nano 2Gb and about 5 months ago I successfully ran Viseron - which I think is one of the best NVR programs with facial recognition. Then I had to uninstall it to make space for new projects.

Now, however, I could use it but whatever version I download tells me I’m missing a decoder. I haven’t followed all the comments, so excuse me for asking a question that has already been asked. Is there anything I can do to fix this and get it working? Thanks!

I would like to stay at the moment on the stable and released version, but I wanted to try also the 2.0 out of curiosity

roflcoopter/jetson-nano-viseron:latest roflcoopter/jetson-nano-viseron:dev

[2022-02-15 15:10:29] [ERROR   ] [viseron.camera.stream.soggiorno] - [h264_nvmpi @ 0x55cca66ff0] Invalid Pix_FMT for NVMPI Only yuv420p is supported
[2022-02-15 15:10:29] [ERROR   ] [viseron.camera.stream.soggiorno] - Error while opening decoder for input stream #0:0 : Invalid data found when processing input
[2022-02-15 15:10:29] [ERROR   ] [viseron.camera.soggiorno] - FFmpeg process has exited

Version 2.0 roflcoopter/aarch64-viseron:modularize [2022-02-15 11:34:55] [ERROR ] [viseron.components.ffmpeg.stream.soggiorno] - Unknown decoder 'h264_nvmpi'