CryptoAPI error


I have 3 web applications that use pdf.kit to append a stamp to documents submitted via the site.. Yesterday 1 on them starting trrowing the folowing error:

CryptoAPI cryptographic service provider (CSP) for this implementation could not be acquired.

and quit stamping the documents. Any ideas as to why this is happening?


Russ Vaughn


Dear Russ,

Thank you for considering Aspose.

Please refer to


I followed the link in your reply with no problem but the link

prodused the following message

Access Denied Message
You can not access: Aspose.Purchase


Please refer to