Failed to execute git checkout '00ea0afa643b3b4383a5cd1a322656c989ade498' -- && git reset --hard '00ea0afa643b3b4383a5cd1a322656c989ade498' -- fatal: reference is not a tree: 00ea0afa643b3b4383a5cd1a322656c989ade498 It looks like the commit hash is not available in the repository, maybe the tag was recreated? Run "composer update nette/di" to resolve this.