I’m sorry to hear that .
This problem may be caused by too frequent operations and I will contact the engineers to troubleshoot the problem.
Please wait for 2 hours and then set up again, or change to another app. For example, if you are using Inkbird pro app, please use INKBIRD app.
Also, please understand that IPT-2CH only supports 2.4GHz wifi, please check if the router settings are correct.
Please refer to this post: