my adapter connects easly to all 2.4Ghz but with 5Ghz it says "you cant connect to that web"

its polish language btw if you need to translate

adapter its brand new yesterday installed and 5G was working properly but today i turned on my computer and

it connected me to 2.4G and i cant connect to 5G and if it finally conects it says "no internet connection"

help!!!!