Wifi problem caused by my MacBook Pro
Hello, I need help :’(. Whenever my MacBook Pro connects to my home’s WiFi, after a few seconds the WiFi router lights begin to freak out and nobody’s device can use WiFi. When I turn off WiFi from my Mac, WiFi works just fine for everybody. Personal hotspot is not a problem, it’s just my computer and the router.
I recently downgraded from Catalina to Mojave. I hope that is not the cause of it because I really prefer Mojave over Catalina.
Some help from this weird problem would be appreciated. Thank you in advance.
MacBook Pro 13", macOS 10.14