@BobRathbone This issue can be closed as I managed to find a fix for my problem. In the nework configuration I used a PSK instead of a password in quotes. I changed the following following file:...

I have an EE Router (UK) and a TP-LINK RE550 network expander in extender mode not mesh. I am using the same password for my EE router and also for both 4G and 5G setups on the RE550. Both 4G and 5G...