This error occurs when a user receives a “Windows Cryptographic Service Provider” error message when trying to sign a LiveCycle form.
This error occurs because the signature was originally created and set up using the Windows Certificate Store as the storage option rather than a digital Id file.
To resolve this, create a new signature. First, select “New ID…” from the dropdown list on the “Sign As” field:

In the Add Digital ID window, select the option for a new digital Id and click Next:

On the next screen, select the option for a new PKCS#12 digital Id file and click Next:

On the next screen, enter your name and email address. Organizational Unit and Organization Name are optional:

Don’t change the “Country/Region,” “Key algorithm”, or “Use digital ID for” fields.
On the next screen, use the default filed name and location. Enter and confirm your password. This password does not change.

Click the Finish button to save your signature. Any time you need to sign a document you should be prompted to enter your password. Your current digital signature will be selected by default.