I too have the same issue trying to export the company data from Quickbooks desktop. My Quickbooks desktop software is up to date. I have tried switching default browser from Edge to Chrome on my computer but to no avail.
Consistent error message as per below when using the command "Company/Export your company data to Quickbooks online:
For security, Intuit does not support this browser or browser version.
See below for a list of supported browsers. Please download the latest version of your preferred browser.
