I used my sellers and buyers of Paypal to work with sandboxes to buy fakes in my electronic commerce, and everything worked fine until 1 hour ago.
Nothing has changed in my code, and I even tried to create and add new API credentials for my site, but every time I try to pay using Paypal Express, I land on the page with the message "Session expired."
On another machine, it still works.
No one on the network seems to know why this is related to my browser?
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