Error installation Liquidsoap

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Hi everyone, installing Liquidsoap, I receive the following error at the end of the installation:

The former state can be restored with:
    opam switch import "/usr/local/centovacast/.opam/4.07.1/.opam-switch/backup/state-20200408170348.export"
! Error: Failed to build Liquidsoap
! Error: Installation failed
Liquidsoap installation failed
Installer exited with error, aborting
root@ip XXXXXXXXX:/# The former state can be restored with:
    opam switch import "/usr/local/centovacast/.opam/4.07.1/.opam-switch/backup/state-20200408170348.export"
! Error: Failed to build Liquidsoap
! Error: Installation failed
Liquidsoap installation failed
Installer exited with error, aborting
root@ip- XXXXXXXXX:/#

Command 'The' not found, did you mean:

  command 'the' from deb the
  command 'he' from deb node-he

Try: apt install <deb name>

root@ip-XXXXXXXXXX:/#     opam switch import "/usr/local/centovacast/.opam/4.07.1/.opam-switch/backup/state-20200408170348.export"
[WARNING] Running as root is not recommended
[ERROR] Opam has not been initialised, please run `opam init'
root@ip-XXXXXXXXX:/# ! Error: Failed to build Liquidsoap
Error:: command not found
root@ip-XXXXXXXXX:/# ! Error: Installation failed
Error:: command not found
root@ip-XXXXXXXXX:/# Liquidsoap installation failed


can you help me?
Hi,

Same problem...  >:(
the only was is to change the BRANCH field stable o testing in the install.sh before installing to install version Centova Cast v3.2.13

BRANCH=testing