MSFS support suggestions are below. Unfortunately, for me anyway, there is something else causing this issue that these steps did not resolve.
Thank you for contacting Microsoft Flight Simulator Support today.
The payment window shows information retrieved from your device settings and Microsoft account. If the payment window does not open or if you encounter an error while trying to purchase an add-on in the marketplace, try the solutions below. Make sure to complete each step before proceeding to the next.
Sign out and sign in again.
Close MSFS.
Sign out of the Xbox app and the Microsoft Store.
Sign in again to both apps with the email used to play Microsoft Flight Simulator.
Launch MSFS and try again.
Remove and re-add your payment method.
Sign in to the Payment optionspage with your Microsoft account.
Open payment options
Find the payment method you want to remove, and then select Remove.
Confirm that you want to remove your payment method, and then select Remove. You can now re-add your credit card, debit card, bank account, PayPal account, or mobile phone as a payment method for your Microsoft account. You can also set up a new payment method.
Select Add a new payment method.
Select the type of payment method you want to add, add your info, and select Save.
Change your default web browser.
Press the Windows key and type “Settings,” then press Enter.
In the Settings menu, click on “Apps.”
On the left sidebar, select “Default apps.”
Scroll down to the “Web browser” section and click on the current default browser. A list of installed browsers will appear. Select the one you want to set as the default.
Update your internet TLS settings.
Select the Windows icon to open the Start menu, and search for Run.
Enter inetcpl.cpl into the Run dialog box and press OK.
Select the Advanced tab and scroll to the bottom.
Inspect the Use TLS settings:
Ensure that Use TLS 1.0 and Use TLS 1.1 are unchecked.
Ensure that Use TLS 1.2 and Use TLS 1.3 are checked.
Note: Your settings may say “Use TLS 1.3 (experimental)”. That’s fine, just ensure that it’s checked.
Press OK to save your settings.
Check that your computer’s anti-virus or firewall is not blocking pop-ups or payment confirmation windows.
For specific instructions, refer to the documentation of your antivirus or firewall software, as the steps may vary by product.
Check for updates.
Click the link below to make sure Windows has the latest updates.
Note: If your Windows 10 version is lower than 15063, you’ll need to update Windows or go to www.microsoft.com/store. To check your Windows version, look here for the field labelled “OS Build”.
Check your time and location settings.
If your account region and your Microsoft store location don’t match, you’ll have a problem making a purchase. You must have a valid billing address and payment option that matches your locale.
Update Microsoft Store on Windows.
You can click the hyperlink within the message “Update to the latest version” to get to your Microsoft Store Library. Then select Get updates, or
Click the link below to open the Microsoft Store app and select Get updates .
https://go.microsoft.com/fwlink/?linkid=2225964
Make sure you are signed into the Microsoft Account/Gamertag you use to play MSFS.
Update the Xbox app on your PC.
You must launch MSFS 2024 from the Xbox app for PC. If the Xbox app for PC isn’t installed on your PC, click the link below and select Download the app.
https://www.xbox.com/en-US/apps/xbox-app-on-pc
Make sure that you are signed into the Microsoft Account/Gamertag you want to play MSFS with.
You can click the hyperlink within the message “Update to the latest version” to get to the update screen. Then select Get updates.
Run the Gaming services Repair Tool.
You can use this tool from within the Xbox app or try the downloadable version. For detailed instructions on how to run this tool, visit:
Gaming Services Repair Tool for PC
Reset the Microsoft store app.
Press and hold the Windows Logo Key then press R to open a Run dialog box.
Enter wsreset.exe and then select OK.
Note: A blank Command Prompt window will open, and after about ten seconds the window will close, and Microsoft Store will open automatically.
Run the Store troubleshooter (Windows 10 only). If you are using Windows 11, you can skip this step.
Windows 10 users can run a Store app troubleshooter.
Open troubleshooters
Select Additional troubleshooters.
Scroll down to select Windows Store Apps.
Select Run the troubleshooter.
If the problem persists after following the steps above, click the link below to try Microsoft’s guided support troubleshooter.
Kind regards,
Microsoft Flight Simulator Support Team
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