Failed to execute git checkout 26965c7a8d10c5d7ad59efa174fddf3671788d75 -- && git reset --hard 26965c7a8d10c5d7ad59efa174fddf3671788d75 -- fatal: unable to read tree (26965c7a8d10c5d7ad59efa174fddf3671788d75) It looks like the commit hash is not available in the repository, maybe the commit was removed from the branch? Run "composer update wporg/wporg-mu-plugins" to resolve this.