I had the following error when I tried to push a package to AUR4.
My PKGBUILD is attached.

Counting objects: 4, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (4/4), done.
Writing objects: 100% (4/4), 1.42 KiB | 0 bytes/s, done.
Total 4 (delta 0), reused 0 (delta 0)
remote: error: The following error occurred when parsing commit
remote: Traceback (most recent call last):
remote: File "hooks/update", line 281, in <module>
remote: die_commit('missing source file: {:s}'.format(fname), commit.id)
remote: File "hooks/update", line 175, in die_commit
remote: sys.stderr.write("error: {:s}:\n".format(commit))
remote: TypeError: non-empty format string passed to object.__format__
remote: error: hook declined to update refs/heads/master
Toaur@aur4.archlinux.org/astah-community.git"> ssh://aur@aur4.archlinux.org/astah-community.git
! [remote rejected] master -> master (hook declined)
error: failed to push some refs to 'ssh://aur@aur4.archlinux.org/astah-community.git'