If you have rsyslog installed and running, it's using that, but without seeing your error output, hard to say.
I'd try "sudo journalctl -u weewx" and see if anything is returned of any value. Which debian version might help a little too. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/0159b2f4-d3c5-4650-9790-fb020610d8bfn%40googlegroups.com.