Hi. I'm new to working on my bike. And I can't get my rear tire to stop rubbing on my frame.

Everything was working fine until I replaced the old cassette for a brand new one. The rear tire did rub a bit before but only when I take a hard sharp turn around a berm or something.

I've checked YouTube and other posts but can't seem to find the right fit for the problem nor the solution. Also, the tire rub does not exist when it's on the repair stand.

This is a 2nd hand bike and my first time taking the rear wheel off. It was my intention to change the cassette for safety and ride ability. I was able to use the rear suspension, manual, pump etc without the tire rubbing but now I can't even stand on it without it eventually rubbing. I can't pump, can't engage my rear suspension etc.

The tire isn't completely true'd but it was like that when I got it and the wobble isn't terrible

What has happened? I am stumped and would love to figure this out on my own rather than taking it to a bike shop. Thanks in advance.