I’m getting the following error when running official action on GithubActions: “Could not find a default branch to fall back on” ALM: Github CI system used: Github Actions Scanner command used: Official GH Action Languages of the repository: c# Error observed: Could not find a default branch to f…

Hi @adanlobato-scopely , This could be related to a misconfiguration of the project key or organization. Could you check if the project key you provided matches the project key on SonarCloud? If the key is correctly configured could you share the log output of the GitHub action?

I’m experiencing the same issue. The project “Sirups.Essentials.Mvc” which should be visible here: https://sonarcloud.io/organizations/sirups/projects From the github action located here: sirups/Sirups.Essentials.Mvc/blob/main/.github/workflows/ci.yml name: Continuous integration on: …

Hi @CoolMcgrrr and welcome to the community ! Can you double check that your main branch is the default one on SonarCloud ? If you go to Administration -> Branches and pull request, there should be a label “MAIN BRANCH” beside the name of your default branch. Mickaël

Thanks a bundle! :slight_smile: I have just verified that my “MAIN BRANCH” is “main”. (Which is as expected) The action failed on the “main” branch. EDIT: I think what I wrote was a bit unclear. So just to be on the safe side. The “Thanks a bundle” was for welcoming me to the community. As far …

Thanks ! How did you create the project on SonarCloud ? Manually, or by choosing the repository on the UI (what we call “onboarding”) ?

I created the project by choosing the repository. I tried running my Github Action before it was created. (My expectation was that it would be created automatically) Since that didn’t happen I created it by choosing the repository

Yes because the log suggests that the binding (when the project was created by selecting the repo) was not created at the time you ran the analysis. So did you tried again with the new setup of your project ? Is it still failing ?

I tried deleting the project in SonarCloud and tried running the action again. I still get “Could not find a default branch to fall back on.” I can’t see anything special about my repository. I have a branch protection rule preventing pushes to the release branch, but that shouldn’t be relevant her…

Hi @CoolMcgrrr I think you may need to provide the -k:{myProjectKey} in your ci.yml file directly when invoking the Scanner for MSBuild, that should work that way. Mickaël

The wrong sonar.projectKey was the issue on my side. My project is here GitHub - n13org/jekyll-kw-loremipsum: LoremIpsum is a jekyll plugin. You can get some dummy text for your webpage, without copy & pasting the Lorem Ipsum words yourself. . I have set up sonar as an organization n13.org and my p…

Could not find a default branch to fall back on

SonarQube Cloud

Topic		Replies	Views
Github action: Could not find a default branch to fall back on SonarQube Cloud sonarqube	6	1681	September 12, 2022
ERROR Could not find a default branch for project with key. Make sure project exists SonarQube Cloud scanner , github , github-actions , sonarqube-cloud	3	177	October 15, 2025
GitHub Actions - 'Could not find a default branch' error with free SonarCloud account." SonarQube Cloud	1	39	March 7, 2025
Could not find a default branch for project with key SonarQube Cloud	4	2244	May 2, 2024
Help with following error... "Could not find a default branch to fall back on." SonarQube Cloud sonarqube-cloud	14	11590	June 3, 2020

Could not find a default branch to fall back on

Related topics