Had the same issue, reproducing my post here:
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Been having this issue with the new feature where an app I added Named Formulas to won't open on the Player for any platform (Windows, browser, or mobile). Just to make sure it wasn't a problem on my end, I opened a different test app and ran the following tests:
1. Run the existing app to ensure it works. PASS
2. Re-publish the same app under the latest/recommended Editor version. PASS
3. Add 'f_Test = "test";' to app's Formula section and add a label referencing that variable, then republish. FAIL
- App hangs on loading circle image and doesn't show the app's icon/title. It hangs there for a decent amount of time (I didn't wait to test just how far it would last, but it can remain like this for at least 1 minute).
4. Remove the formula and make the label just say "teeest" on its own. FAIL (not sure why)
- Same issue as previous test.
Just to be sure, I tried again with a new, blank app:
1. Just publish an app with no changes except a standard label (using default authoring version 3.22091.11). PASS
2. Turn on Named Formulas, add second label with default text, and republish. PASS
3. Add formula 'f_Test="test";', add third label with default text (not using formula value), republish. PASS
4. Add fourth label and set its Text value to f_Test, republish. FAIL
- This one reached the loading screen that shows the app icon/title, but then flickered once a few seconds later (said "Getting your data..." I think) and crashed to a white screen saying "This app stopped working. Try refreshing your browser." and a session ID. Refreshing just took me back to this screen. Closing the browser and re-opening flickered the screen again, then showed me the refresh message. Cache clear had the same effect. Opening in the Windows player gave a generic error message a few seconds into loading, and the mobile app hangs here for at least 5 minutes without opening.
5. Change the fourth label's Text value from f_Test's value to "something else here", republish. PASS
6. Change the label's value back to f_Test's value, then save/republish the app under the newest authoring version (3.22092.12). FAIL
- Same as step 4, but this time the mobile version gave an error message very quickly instead of just sitting there.
Has anyone found something that prevents this?