Error when browsing certificates in the cPanel SSL/TLS interface

Symptoms

Clicking 'Browse Certificates' in cPanel -> SSL/TLS -> Manage SSL Hosts or running the whmapi1 listcrts call for a user results in the following error:

The certificate list could not be retrieved because of an error: Can't call method "parsed" on an undefined value a/usr/local/cpanel/Cpanel/SSLStorage.pm line 247.

Description 

This error can occur if the user's SSL database has become corrupted. 

Workaround

Rebuild the user's SSL database:

# /scripts/rebuilduserssldb $user

Note: Replace '$user' above with the affected cPanel username