Stored variables are not working in web preview today when assigning strings to variable. Works fine in the Thunkable app and works fine with app variables. We have experienced the same issue for multiple users on Firefox, Brave, and Chrome.
Here’s an example that is not working. The button will not go to screen 2 as intended. Changing to app variables works.
https://x.thunkable.com/copy/e5dbb8fbfffb26195c2a347677972fc8
Hi @iostrom73o , welcome to Thunkable! 
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We tested the copy project and could see the variable’s value without issue.
However, I understand that it may not be working for you as expected.
We would like to suggest that you try the following copy of the project that I have attached below:
https://x.thunkable.com/copy/2cb0f27f02d2612b1f6a77ba9d656e4d
Let us know if it worked.