Failed to install snaps from private store, 404 error

Hello, I’m trying to install from a board connected to our private brand store (Domotz) the following snaps:

  • domotzpro-c1-kevin
  • domotzpro-c1
  • domotzpro-c1-kernel
  • domotzpro-core22-locker

However, every time we got a 404 error, here’s the log. Do you know what is going wrong here?

snap install domotzpro-c1-kevin
error: cannot perform the following tasks:
- Download snap "domotzpro-c1-kevin" (3) from channel "stable" (received an unexpected http response code (404) when trying to download https://api.snapcraft.io/api/v1/snaps/download/xxxxxx.snap