Xiaomi Mi Router 4A Gigabit Edition (R4AG/R4A Gigabit) -- fully supported and flashable with OpenWRTInvasion

just hooked up a serial console and got these lines just before reboot:

Fri Jun 28 11:32:20 CST 2019 boot_check[3263]: ERROR: KEY SERVICE FAILED: EXITCODE=1;ESP=1;LIMIT=65;CMD=/etc/rc.d/S21sysapihttpd;ARG=boot;
Fri Jun 28 11:32:20 CST 2019 boot_check[3263]: ERROR: 1 KEY SERVICE FAILED.
Fri Jun 28 11:32:20 CST 2019 boot_check[3263]: Try rebooting system to recover.
[ 28.240000] dev_redirect: add(+) dev redirect mapping: src:eth1->dst:ifb0

any ideas?