DNS does not work after OpenVPN setup

Hello, I've flashed openwrt-19.07.8-ar71xx-mikrotik-rb-nor-flash-16M-squashfs-sysupgrade.bin to Mikrotik RB931-2nD aka hAP Mini, and now I try to set up OpenVPN connection, to access censored sites like github.com. I followed the guide, steps 1-3, 4.1a, and have no TCP connection to internet. Btw, traceroute hangs, but if I do ping -t 3, I see “TTL expired” reply from IP belonging to VPN provider.

UPD: Syslog.

UPD2: TCP connection actually passes if I query something by IP, but DNS does not work.