@AndrewFD As a start update your RE firmware to the latest version TL-WA850RE(EU)_V7_1.0.13 Build 231115 from here. This could probably resolve your issue, since this FW release fixes some problems...

@Shids If you want your RE220 to be wired to your router, you have to change its working mode to AP. - details.

@tpl Nope. As I mentioned, this is a security feature which is not meant to be disabled.

@reyravivish Follow this video on how to recover your WR940N.

@AvvDev If you have more that 100 mbps from your ISP you need at least a gigbit router to utilize this bandwidth.

@cyndrome Archer C80 is only a wireless router - there's no modem in it. These screenshots are not particulary useful. Describe your network devices (including ISP provided if there's any) in more...