I've been trying to upgrade the firmware on my router without success. I downloaded the file from the website (Archer C24(EU)_V1_1.12.0 Build 230109), extracted it and uploaded it in the firmware upgrade section. When I click "upgrade" however, it get's to about 5% and then says "Failed to upgrade the firmware. Please check the configuration file and try again."

Please help as several devices won't work on the router because of outdated security protocols.