PKPASS showing contents rather than opening

Hi

I am having an issue with a PKPass I am creating using .NET Core. Basically the PKPass is not being opened correctly in Apple Wallet. For example if I try to share it on Whatsapp, rather than opening the Pass in wallet, the contents and therefore background image, manifest are being displayed. When I try with another PKPASS which I have not created the pass shows automatically in Apple wallet.

Is there anyone who can help?

Thanks

Is there anyone who can help on this?

PKPASS showing contents rather than opening
 
 
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