The job was canceled because "_7_4" failed.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires flarum/core ^2.0, found flarum/core[dev-release/v1.6.2, dev-release/v1.6.3, dev-release/v1.7.2, dev-main-borked-with-split-conflicts, dev-main, dev-master, v0.1.0-beta, ..., v0.1.0-beta.16, v1.0.0, ..., 1.x-dev (alias of dev-master)] but it does not match the constraint.