Hi there, clmpacificgreenr.
Thank you for taking the time to visit the Community. I want to make sure you're able to add your logo.
To start, it may be a good idea to clear the cache in the internet browser. Sometimes the cache can become overwhelmed with older data, potentially causing performance errors in QuickBooks Online. There are just a few steps to get this done. This article will walk you through the process depending upon which browser you're using: https://quickbooks.intuit.com/community/Getting-Started/How-do-I-clear-my-browser-cache-and-temporar....
If you're still unable to add your logo, I recommend calling in to speak with a member of the Support Team. This problem may be related to a known issue. The engineers have been made aware and are diligently working to get it resolved. An agent will be able to get you added to the list of affected companies. Once you're added, you'll then receive email notifications regarding the resolution. The number to speak with an agent is 1-800-488-7330. The most up-to-date contact information can be found here: https://help.quickbooks.intuit.com/en_US/contact. You may want to mention to the agent that you believe this problem could be connected to investigation #23652.
Please feel free to leave a comment below and let me know how the conversation goes. I'll be here to help in any way that I can.