Hello! Thank you for purchasing PS!
Sorry for the problem, lets try to find the error and solve it ASAP.
Which version are you trying to play? PC, Mac or Android? Can you explain me the error in more detail? A screenshot would help a lot.
You can try to download the mirror link. If you use the itchio app, you can try to download from the browser.
If you still have problem, I can send the download link to your e-mail.