title: Github - Merging is blocked - The base branch requires all commits to be signed
body: <p>Github is blocking the pull request from being merged, even though all the commits are verified.<br>
  Rule settings: 'Require signed commits' &amp; 'Include administrators' are checked.<br>
  Does anyone know how to solve this?<br></p>
  
  <p><a href="https://i.stack.imgur.com/GVmfM.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GVmfM.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/6Bngl.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6Bngl.png" alt="enter image description here"></a></p>