@smkumar What is the model number of your TP-Link device? Generally speaking, there will be a reset button on the back; with the device powered on, hold the reset button/hole for 10s to hard reset...

@Octron Hello, thanks for your feedback. May I know do you have any other smart phone to give it a go? What is the current kasa app version you installed? Please show us a screenshot of the error...

@Nasedo Thanks for your clarification, we will do some troubleshooting to locate the issue and try to fix it. 1. Try to delete the driver and reinstall it. Below is the download link of the driver....

@Simone_TP Hello, we did a test at our lab, the current issue is normal. The message you saw means that there is no more onemesh devices to be added. Below is a picture in English version which is...

@LoopyLu Thanks for your feedback; We have noted and will keep an eye on similar reports. Then we can remind our R&D colleagues and they can work on it and evaluate the feasibility. Good day.

@Mewash Hello, if you connect the TL-MR3420 to the wall plug by ethernet cable to get internet, you need change the operation mode to wireless router mode first under advanced-operation mode page....