This error/issue has lots of posts on it. Eg
“No Signal” in the pairing screen - #32 by Jeroen_Hoogendoorn?
Some people find a fix by just turning everything off and on again. There are might be some solutions if you look but here are some suggestions: Like the post above says disconnect trainer from the wahoo app. You may have already tried all that. I’d suggest you do the following (found on another post)
- Look in your Documents \ Zwift folder. In there is a file called knowndevices.xml. This is the file that stores what trainers and sensors you have paired with on that machine. It’s a plain text file you can open it in Notepad to see what’s in it.
- Go ahead and rename that file knowndevices_original.xml rather than delete it.
- Start up Zwift - when you do, you’re starting from a clean slate and you’ll have to pair up to your trainers and sensors from scratch.
- When you save and exit the game, it will create a new knowndevices.xml file and that will cause it to remember your freshly-paired sensors.