I'm struggling to understand why I can't flash my router. I'm reading that ASUS may have disabled some compatibility with older firmware etc. I'm also reading that I should ignore the failure messages "error transmission" and just wait. This router shows as running 126.96.36.199.380_3479-g683f27a i'm only connected to it via my network cable on port 1. Wondering what I'm missing here. My old E3000 was easy peasy. I tried FreshTomato 2018.2, Shibby 137, 138, 140. Thank you.