Same thing happen to me. The payment buttons generated by paypal sandbox was working yesterday now it just redirects to a white screen(page) with Internal Server Error (500) when inspected in the browser console. A lot of searches on google and found out that it's not only happening on my side but on some users too. What I did to make sure that it's not because of the website that I'm currently working on is, copy and paste the complete url generated by the paypal sandbox button generator directly on the browser window and same thing. white screen with Internal Server (500). Any suggestions?
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