failed to remove builder-16358c20-2bc7-4c35-ad1d-c045a3f0b3d0: error during connect: Get "http://docker.example.com/v1.49/containers/buildx_buildkit_builder-16358c20-2bc7-4c35-ad1d-c045a3f0b3d01/json": command [ssh -o ConnectTimeout=30 -T -l ec2-user -- ec2-15-188-101-126.eu-west-3.compute.amazonaws.com docker system dial-stdio] has exited with exit status 255, make sure the URL is valid, and Docker 18.09 or later is installed on the remote host: stderr=Connection timed out during banner exchange Connection to 15.188.101.126 port 22 timed out ERROR: failed to remove one or more builders