Struggling to push to master?

After configuring your repo  and you're encountering errors when pushing to master

Error: the master source reference specifier does not match any reference

Error: Unable to push references to 'xxexeegau7ik2@git.uk-1.platform.sh:xxexeegau7ik2.git'. Unable to push on platform master branch.

Is it possible you’re not on the master branch locally, but on something like main? If so, you’ll need to reconfigure the branches on Upsun or change your local (and presumably GitHub) to use master instead of main.