web controller doesn't work on openwrt 18-19

[ilovegalya]

It blames on some authentication function in path /usr/lib/lua/luci/controller/arduino . How can I fix it? ;) I can't even start luci normally after installing yunbridge :(
error message:
/usr/lib/lua/luci/controller/arduino/index.lua:65: attempt to index field 'authenticator' (a nil value)
stack traceback:
/usr/lib/lua/luci/controller/arduino/index.lua:65: in function 'v'
/usr/lib/lua/luci/dispatcher.lua:695: in function 'createtree'
/usr/lib/lua/luci/dispatcher.lua:347: in function 'dispatch'
/usr/lib/lua/luci/dispatcher.lua:208: in function </usr/lib/lua/luci/dispatcher.lua:207>

after I removed authentication function I take this error message: Could not connect to YunServer 146 Connection refused

at a system log I find an error: daemon.info procd: Instance yunbridge::instance1 s in a crash loop 7 crashes, 0 seconds since last crash

I found this line on /sbin/yunbridge:
stty -F /dev/ttyS0 2500000 clocal cread cs8 -cstopb -parenb
command "stty -a -F /dev/ttyS0" gives me an error: "/dev/ttyS0: I/O error "