It can be challenging, dev. 

I appreciate the troubleshooting steps you've taken to resolve this issue. 

Since the necessary steps to eliminate this have been preformed, but still experienced the same results, I recommend contacting our support team. They have the resources to securely determine this issue through screen sharing while ensuring you're personal information remains safeguarded.     

Here's how: 

1. Go to Help, then select QuickBooks Desktop Help/Contact Us.
2. Hit Contact Us.
3. Give a brief description of your issue, then Continue.
4. Sign in to your Intuit account, choose Continue, and then Continue with my account. 
5. We'll email you a single-use code. Enter your code and select Continue.
6. Click chat with us or Have us call you. 

In the meantime, we can run the reports manually and download them in Excel format. This will allow us to send them via email.

Let me know if you have follow-up inquiries about managing your scheduled reports. I'll get back to you as soon as I can. Keep safe!