-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/php
-----> PHP app detected
-----> Bootstrapping...
-----> Installing platform packages...
! ERROR: Failed to install system packages!
!
! Your platform requirements (for runtimes and extensions) could
! not be resolved to an installable set of dependencies, or a
! platform package repository was unreachable.
!
! This usually means that you (or packages you are using) depend
! on a combination of PHP versions and/or extensions that are
! …
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