Once Microsoft Store is open, then you should press on your Microsoft Account option present on the top right corner beside the Search box and select Downloads and Updates from the menu.

Search for Microsoft store and select the first result.

To check whether all of your apps are up to date and fix this error you have to follow this line command.

If you don’t have the latest version of the apps installed on your system, then this may also raise the issue of the app not opening.

Now check with open any app if working normally.

Once it is completed, restart Windows to apply the changes,.

Hit the Check for updates button to allow Windows update download from Microsoft server,.

Click on Update & security than Windows update,.

Press Windows + I keyboard shortcut to open the settings app,.

Microsoft regularly releases Windows 10 updates with various bug fixes and security improvements And installing the latest windows update having the bug fix for that causing Windows 10 app, not opening. This is the first and most important solution you must apply before performing other solutions. Ensure that the Windows 10 operating system is updated

Windows 10 apps closing automatically