@Michael234, please try the firmware below.
SOHO MK3 https://download.peplink.com/firmware/br1ac/fw-max_br1mk2_hotspot_sohomk3-7.1.0s021-build1289.bin
SOHO https://download.peplink.com/firmware/soho/fw-surf_soho-7.1.0s021-build2883.bin