after running
trytond-admin -c trytond.conf --all I see another issue:
tryton.jsonrpc.Fault: File not found : /usr/local/lib/python3.9/dist-packages/trytond/modules/reports/tryton.cfg
the tryton.cfg is listed in the module. Maybe it wasn’t copied during the install. But I am guessing. I do not know how the installation of the module works with tryton/docker-compose.