ERRO[0043] failed to dial gRPC: unable to upgrade to h2c, received 501 : <p>When I tried building my Dockerfile with <code>docker build -t myimage1 .</code> today I got this error:</p>

<pre><code>ERRO[0043] failed to dial gRPC: unable to upgrade to h2c, received 501
context canceled
</code></pre>

<p>I have successfully built this image before although it was a couple of weeks ago. I am not sure whether Docker has been updated in the meantime.</p>

<p>I found a similar error (although not the same - it is error 0044 while mine is 0043) at <a href="https://stackoverflow.com/questions/55308947/erro0044-failed-to-dial-grpc-cannot-connect-to-the-docker-daemon/58731161#58731161">ERRO[0044] failed to dial gRPC: cannot connect to the Docker daemon</a></p>
