I have updated my post on what is new with FFmpeg version 6.1 with information on how to fix this error.
No such filter: 'drawtext' ████
████ Error processing filtergraph: Filter not found
████
████: Filter not found10 December 2023
Stumped by ‘No such filter: 'drawtext'’ error in FFmpeg 6.1?
The filter is dependent on several libraries. One of them is new and was not included when your ffmpeg binary was built.