Thank you, @kurt.
It makes sense and, departing from your answer, I went to further debug and the error I was now seeing probably was due to IP addresses whitelisting.
I was using a range for ‘ams’ you indicated here:
That was from Sep/2021 and it seems there is a new one to be added, namely:
145.40.97.0/24
After adding this one to be whitelisted, the release_command became operacional.
Thank you!