Failed to execute git checkout 13e535fe3f08fd753ae47d3ce8ff0f34f53ac144 -- && git reset --hard 13e535fe3f08fd753ae47d3ce8ff0f34f53ac144 -- fatal: unable to read tree (13e535fe3f08fd753ae47d3ce8ff0f34f53ac144) It looks like the commit hash is not available in the repository, maybe the commit was removed from the branch? Run "composer update silverstripe/asset-admin" to resolve this.