Gosund SP112 and Huawei B315 router - pairing problem

Hello warmly I have purchased myself a Gosund SP112 socket and cannot seem to get the hardware to work. I start pairing a router Huawei B315 next to the phone. I waited until it reached 100% and failed to connect. I said that there is something wrong and wanted to send it back, but I said that I would do another test. I set up a hotspot on the other phone, connected my phone to the hotspot and started pairing after 15% pairing was successful everything works. So it seems that something is wrong with my router but what? I have tried everything reset, restore etc and nothing works. Thanks in advance for your help .

Do you have WPS enabled on your router?

I have. I borrowed some cheap router from a friend and all smart devices work without any problems. I have already done wonders with this huawei and nothing worked. My friend's equipment is TP LINK WR 702 quick configuration and everything works.

Check that you can connect with e.g. your phone using WPS.