Thanks for reaching out. I'm here to help.
Another user (@Arboleda) mentioned they were experiencing a similar error. If your product is a custom product, then this is likely a display error and there is nothing you would need to do to move forward. The Google product categories should be working fine.
I also added some questions to troubleshoot in my reply on this thread earlier here. Can I get you to answer those questions? I would be happy to take a look after you've provided me with more details on what you've tried and to these questions.
I look forward to hearing from you,