Travel router AC750 not connecting
I've been using the AC750 travel router in my garden office successfully for 4 months & it's stopped working. The builders fitted an Ethernet cable from the house to the office and that plugged into the router & I had Wi-Fi. Now it won't work. Someone suggested tethering it when inside my house which I have done (via the app) but have no idea what to do now? There is no trouble shooting or status update etc
Since it stopped working, I've plugged the ethernet cable directly to my laptop & it's working perfectly, but I need a reliable Wi-Fi connection in my office for other devices, do I need to upgrade to a different router? This travel one was fitted by the builders. Any help much appreciated, please bear in mind I know nothing technical! Thank you so much