Errors in creating estimates may occur if the session loading QuickBooks resources is interrupted, abphome.
To resolve this, we can refresh the browser page by clicking the Refresh icon in the upper-left corner or pressing F5 on your keyboard. This will reload the page, restart the session, and refresh the QuickBooks Online resources, allowing you to reenter the estimate details.
Alternatively, logging out of your account and back in can often resolve the error.
You may also try using a different browser. Ensure that the new browser is up-to-date and compatible with QuickBooks Online.
Please don't hesitate to reach out if you need further assistance or anything else.