FFXIV 90001 Error Constantly ( Help )

So I don't know if it's just me or anyone else. But ever since patch 6.51 i've been getting disconnected constantly with error 90001 either every 20-30 minutes or once every 2-3 hours

i'm using Spectrum Wi-Fi Wireless and me & my family recently just moved to a neighbourhood rather than living in the country-side.

My pc is in my bedroom while the default Spectrum Router that Spectrum Internet gave to us is right in the living room. The thing is. My room is right behind the wall that the router is behind.

I've tried absolutely everything that I can think of / that I read online. And i'm starting to grow desperate. We never had this issue with our internet at our old house, and I was much, much further away from the router back then.

I'm seriously considering getting a wi-fi booster or something for our router. But I have no idea if that would fix it. Any advice would certainly help, whether we need a stronger router, a wi-fi extender. Or if its just FFXIV itself thats currently having the problem?