I try another board - the same result. Seems like it is not hardware problem

Good day.
When nothing connect to i2c bus on omega2+, i2cdetect give strange output
i2cdetect 0
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-0.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 31 32 33 34 35 36 37 -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 51 52 53 54 55 56 57 58 59 5a 5b 5c 5d 5e 5f
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
I dont understand why

Good day.
I am try to build firware(lede) from sources https://github.com/OnionIoT/source.git
During compiling packet o2-wifi, error hapend
cp -fpR ./wifi_binary/mt_wifi.ko_4.4.74 /home/user/onion/onion_o/source/build_dir/target-mipsel_24kc_musl-1.1.16/linux-ramips_mt7688/o2-wifi-2015-06-01/ipkg-mipsel_24kc/o2-wifi/lib/modules/4.4.74/mt_wifi.ko
cp: cannot stat './wifi_binary/mt_wifi.ko_4.4.74': No such file or directory

When I try to build firmawe from lede sources v17.01.4 https://git.lede-project.org/source.git, I get the same error.
Where I can find this file(mt_wifi.ko)?