@MarkNagy yes I've tried all the possibilities that I could think off. But, there is update on the issue. I've enabled permission under Other permissions: Open new windows while running in background. I'm not sure if this solved the problem, but I succeeded adding several windy widgets. So for now problem solved. Thank You for your assistance.

Best posts made by sasbibic
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RE: Widget not loading
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RE: Windy V40 - What's New
@Ondřej-Šutera already 'checked all the boxes' from mentioned post. Cleared cache, cleared All data, reinstalled complete app, no progress ....
Regards
/Sas