Hi@ChinB_Y-123,
Thank you for contacting our community.
Before you create Easymesh network, please hard reset the range extender: With the power on, use a pin to press the RESET hole for 1 second to reset the extender
If you want to add a range extender as a satellite device, please refer to How to add an extender to an EasyMesh network as a satellite device.
It is recommended that you can use Method 1.