Deployment with Gigalixir/Problems: (Mix) The task “assets.deploy” could not be found

Hello, everybody
I am having a problem deploying an app.

It gives this message here:

** (Mix) The task “assets.deploy” could not be found
error Command failed with exit code 1.
remote: 2022/12/06 02:33:30 exit status 1
remote: Deploy aborted
To https://git.gigalixir.com/portdev.git/
! [remote rejected] master → master (pre-receive hook declined)
error: failed to push some refs to ‘https://git.gigalixir.com/portdev.git/

Anybody can help me?
It’s my first time deploying D: