Thanks for joining in on this thread, Nelly111S.
I checked our reports but haven't found any on-going investigation about the PayPal error code 355. We can perform some troubleshooting steps to fix this issue.
Let's open your QuickBooks Online account using the incognito or private browser. This mode doesn't store cache.
Here are the keyboard shortcuts:
- Google Chrome: Ctrl + Shift + N
- Mozilla Firefox: Ctrl + Shift + P
- Safari: Command + Option + P
Once signed in, try to connect your PayPal bank. If it works, go back to your regular browser and clear its cache. Clearing cache helps refresh your browser settings. Please make sure to restart your browser afterwards.
You can also use a different supported browser as an alternate solution.
Please let me know of the result. I'm here to help you out until a solution is found. Take care!
