How to get more logs about a 503 Service Available when sync EMClient to a synology Nextcloud Caldav Instance


I have a NextCloud instance on a Synology which seems to work great for the files part.
I added the calendar app in NextCloud and tried to connect with EMClient.

When EMClient tries to sync, I get a Service Unavailable Error.

But data/nextcloug.log and var/log/httpd/apache22-error_log doesn’t show any error.

I tried with the apache24 pacquage, same result.

How can I get more log about this error ?

Note that the Calendar app in Nextcloud is just a client. The actual CalDAV server is in the Nextcloud server itself.

You can enable CalDAV logging in emClient’s settings under Advanced / Logging.