Mux failed and decryption failed on a segmented dynamic live MPD

[endmarsfr]

I got this error when trying to download an mpd live stream for the following command:

17:42:30.081 ERROR: Mux failed
17:42:30.082 ERROR: Failed

./N_m3u8DL-RE.exe "https://*******/live/210/1/live.mpd" --mp4-real-time-decryption --key-text-file ./keys.txt --live-keep-segments true --live-real-time-merge --live-record-limit "00:02:00"
--auto-select --log-level ERROR -M format=mkv --del-after-done --save-name "decrypted" --save-dir "d:\output" -mt TRUE --thread-count 12 `.

Even though I have the keys, decryption failed on the non-muxed streams.
The streams are segmented. I also tried decrypting each segment, but that also failed.
On non-live streams everything works fine (decrypt, mux, play).

The mpd is protected with "urn:mpeg:dash:mp4protection:2011".

I looked at the source code of N_m3u8DL and found that segmented downloads are decrypted using AES_128_ECB or AES_128 or CHACHA20.
How can I make sure that the segments are decrypted using the appropriate method for "urn:mpeg:dash:mp4protection:2011"?

Can you help me?

Best regards