@ryg Yes u can try Google Chrome Browser

@ryg Please use Google Chrome Browser then try again

@ryg No everything working fine for me. You can install this old beta firmware 1.7.0 which was released in January 2024...

@ryg Do factory reset and do the setup again and use Deco M4 as a (Main Unit) and then install the firmware by login the Web UI (192.168.68.1) and when the beta firmware installed successfully then...

@ryg I think your Deco M4 is V1 not V2 please check it again and send me the picture of the sticker below on Deco M4

@ryg Maybe your PC changed the file format thats why i said try on your mobile phone also can you attach a picture of your Deco M4 sticker which is down below on your Deco M4 which version you have...