Due to that the PR plugin can not be used to merge PR from the web UI when the plugin is newly installed and no repo has been created in a new project, you will get the following error:
400 Bad Request: This Pull Request cannot be merged: Command execution failure: git --work-tree='/var/lib/codendi/gitolite/repositories/.tuleap-pr/pr_OinNs4' --git-dir='/var/lib/codendi/gitolite/repositories/.tuleap-pr/pr_OinNs4/.git' push --porcelain '
gitolite@gl-adm:tuleap/reponame.git' HEAD:'master' (return value: 128):
W access for tuleap/reponame DENIED to id_rsa_gl-adm
(Or there may be no repository at the given path. Did you spell it correctly?)
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.