Hello. We have several sites, the experience in connecting payments from PayPal is available. We created a new site, we decided to use it - <iframe> at the same time, when the client reaches the shopping cart, then he moves and chooses to pay through the sandbox, he throws it into the sandbox. In the sandbox where there is a check, PayPal is constantly frozen, payment is not working and the client is hanging. If you use a direct link, without <iframe> everything works! Tell me why payment from PayPal does not work in iframe? Thank you.
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