I'll make sure you're able to import miles. Let’s run some basic troubleshooting steps to rectify the issue. Let's access your QuickBooks Self-Employed (QBSE) using an incognito mode or private browser. This is to determine if this is a cache-related issue. Thus, the webpage is preventing the online program from importing miles from the Stride app.
Here's how:
Google Chrome: Ctrl + Shift + N
Mozilla Firefox: Ctrl + Shift + P
Microsoft Edge: Ctrl + Shift + N
Safari: Command + Shift + N
Once signed-in, try importing miles again. If it's successful, go back to your regular browser and clear your browser's cache. Performing this process will optimize the QBSE performance. If you continue to get the same result, use a supported browser and check the invoice from there.
Additionally, here's a link that'll help you manage QBSE tasks. It has topics with articles to guide you along: View all help for QBSE.
Reach out to me again if you still have questions or concerns with importing miles into QBSE. I'll be here to help. Take care and have a wonderful day ahead.