hAP ac² - Can't install


I'm trying to isntall Openwrt to Mikrotik hAP ac², to use tvheadend, but im hitting a wall. The kernel installs okay, I can boot luci web, everything working, but when I try to sysupgrade, as I'm supposed, yhe router bricks itself, and must start over again. I tested installing the sysupgrade via web, and telnet.

Can you provide more details, perhaps a screenshot?

Telnet isn't used on newer versions of OpenWrt, SSH is. What version are you attempting to install?