Automatic disconnection of Mac and iPad from Wi-Fi

Hello, I faced a strange problem today. My Mac and iPad automatically disconnect from WiFi at the same time and can't find WiFi anymore (my WiFi is not hidden) and this continues until I turn off WiFi and turn it back on after 2-3 minutes. and then they find Wi-Fi and connect to it, and if they connect to it at the same time, they are disconnected again, and this problem repeats again and again and never ends. The interesting point is that if only one of my devices is connected to Wi-Fi and that one's Wi-Fi is disconnected, the connected one will not be disconnected. But as soon as I connect that one device to Wi-Fi, even if it is connected to another Wi-Fi, in any case, both Wi-Fi devices are disconnected and the problem repeats. This problem has existed in my Mac ever since I updated macOS, but not with this severity, but since today, my iPad has also found this problem, and it seems that these two can't bear to see each other anymore, and if both are connected to Wi-Fi They disconnect them.

Does anyone have an idea what I should do?