Hello, CPR Kim.
Welcome to the Community. Allow me to share some insights about the error you've got. It might be because your cache data is overloaded. Sometimes a browser cache can be corrupted and can cause a variety of issues.
Let's open a private browser and post from there. This is to identify if the issue is within the cache. If you don't encounter the same thing. Go back to the original browser and clear the cache. However, if the same issue persists use a different browser in posting.
You can also check this article for reference: Troubleshooting browser problems.
I recommend reaching out to your accountant as they would know what is the best category to use.
I've also added these great resources you can use on how to manage your bank accounts and transactions in QuickBooks Online:
I'm always around if you have more questions about categorizing transactions in QuickBooks Online. Just leave a reply and I'll get back to you.
