magento 1.9 – SUPEE-11085 does not work

I SSH Hotfix – Hotfix for Direct Signature After Signing – and he was successful following the instructions provided here – https: / / support / hc / en-us / articles / 360024368392? flash_digest = f47655cd8c97b1c9a32f9f6a6cf0a05174642823

I entered my security key and registered it successfully. I then made a purchase and when I select "Place an order" at the end, all that happens is that the page is flashing. I do not receive any error. I do not know what's wrong. I contacted and they said to contact Magento. Direct Post transaction key update (MD5 to SHA-512)