Watch app wont install after download with Business Manager

We created an app for iphone which includes a Watch app. The app works well during debugging, and also in TestFlight the Watch app installs nicely and does what it is supposed to do. However, when we make the app available through the Apple Business Manager (the app is for internal use by a company) the Iphone app downloads without problems, but the app for the Apple Watch does not work.

When I go to the Watch app on my Iphone (where you can manage the apps on your Watch and so on) my app is listed, but when I press install I see a loader for a few seconds, then it stops but nothing else happens.

So the code seems to be good, but after I download the app with a code through the Business Manager, then I cannot install the Watch version of the app.

Watch app wont install after download with Business Manager
 
 
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