When I oen a company all I get is a blank page.%0D%0AIt will not let me do anything else

I understand how this may have caused inconvenience to you. I appreciate your patience regarding this loading issue. Allow me to share some troubleshooting steps you can perform to rectify this error.

You'll want to utilize the Verify and Rebuild Data feature in your company file. It is to help us determine if there are issues with your company data. Here's how:

1. Choose Window, then Close All.
2. Verify Data. Choose File and Utilities. Select Verify Data. If you see:

• "QuickBooks detected no problems with your data," no further action is needed.
• A specific error message there may already be an article for it. Try searching for it on our QuickBooks Desktop support site for instructions.
• "Your data has lost integrity" indicates data damage in the file. Continue to the steps below to Rebuild Data to correct the problem.

For detailed information about the steps, please visit this article: Verify and Rebuild Data in QuickBooks Desktop. 

You can visit this article you can use in the future: Customize reports in QuickBooks Desktop.

If you have further questions about your data in QuickBooks or any additional related concerns, don't hesitate to post them here in the Community. We're always available and willing to lend a hand to your queries. Have a great day ahead.

@Locy 

Try opening the sample file. Did you encounter the same problem?