unable to open my substack after updating my mac OS to 15.5

I updated my OS to Sequoia 15.5 om my 2019 macbook pro. Everything seems to work fine except I can't load my substack. It starts to load, I can see my profile pic and it shows my account name when i hover over it, but it wont continue opening. Everything else I've tried works fine, the substack is the only issue. That's a problem because I live off of my substack account. Help!