Hi there, ap71.
I'd like to ask what bank you are using so that we can verify and provide available workaround. For now, you can check their bank website if they're having maintenance updates.
Also, you can check the website's URL if it's they changed it. If that's the case, you can disconnect your bank with QuickBooks and reconnect it again to fix it.
You can check out this article to know more about the possible fix whenever you encounter a bank error: What to do if bank transactions won’t download or there's a bank error. It's intended for US users but also works in your region.
I'll be a few clicks away if you need anything else. Stay safe.
