Accept Button Stuck on Loading

Hey everyone! For 3 days now, I’ve been trying to accept an invite to an organisation, but the accept button is stuck on loading. I’ve tried switching devices, refreshing the page, restarting the device, declining the invite and getting sent a new one, and anything that came to mind. But nothing has worked. I tried accepting the exact same invite on my sister’s account, and it let her accept it straight away. Has anyone got any advice on how to fix this?