I have a Xperia Mini Pro with locked bootloader, so the only firmare I can load is ICS 4.0.4. I installed Nextcloud client seamlessly but I got an SSL error with DavDroid 1.6 (the last one compatible with ICS afaik). I tried with different custom ROMs, the official .587, previous versions of Davdroid, and it returns me always the same error.
Attached last debug
THXDAVdroid 1.6-ose debug info.txt