@Toboe While you wait for @David-TP try deleting your cookers on the browser you use to access the web interface. I had the same problem trying to access the web ui after the upgrade and that fixed...

@pjs_gsy Here is the list so you have it https://community.tp-link.com/en/home/forum/topic/631936

@David-TP

@BE63_Topography Please find the answers to your questions below No Yes No

@Panamon_Creel Are the speeds your getting via Ethernet or WiFi? Also is this on a desktop or laptop? or a different device?

@kerykeion I understand that you noticed the 5GHz_2 band is unchecked in your Deco X90's WiFi advanced settings, while the 2.4GHz and 5GHz_1 bands are enabled, and you're wondering if the 5GHz_2 is...