Your feedback on the troubleshooting steps is appreciated, kate100. We'll ensure you reach the right support team to fix the error so you can generate a bank file for your bill payment.
 

Since the error persists, we recommend reaching out to our QuickBooks Online (QBO) Care Team for further assistance. Once the issue is identified, our agents will assist you in applying a permanent fix. This will ensure you can create a bank file for your bill payment effectively.
 

Here's how to contact us:
 

1. In your company, go to the Help icon in the upper left to see more details
2. Go to the Assistant tab and enter a brief description of your concern in the Type or ask something box.
3. Click the Contact us link to view the support options.
4. Select Callback to speak with our phone agents or Chat to initiate a conversation.
   
   

Also, we're open Monday-Friday 8:30 AM-6:30 PM AET. Refer to this article for more details: Contacting QuickBooks Support.

Feel free to open each link below for helpful tips on managing supplier expenses, bills, and payments:

• Enter and manage bills and bill payments in QuickBooks Online
• Learn the difference between bills, cheques, and expenses in QuickBooks Online
   

Furthermore, refer to these resources for guidance on assigning a preferred supplier to particular inventory items and generating a monthly expense report:
 

• How to run and save a monthly expense report by supplier
• How to add a preferred supplier and create a purchase order using that preferred supplier in QuickBo...
  
  

Stay in touch if you need assistance navigating QBO or have other supplier-related concerns or questions. The Community is always available to lend a hand.