User certificate installation failed Oracle Wallet Manager

Cause

following issues can cause this error:

• The wallet is missing the correct root certificate
• The wallet is missing the correct intermediate certificate
• There is no matching certificate request found
• The SSL certificate was signed using the SHA2 (SHA-256) Signature Algorithm

Solution

Troubleshooting a missing Root or Intermediate CA:
To resolve this issue, download and install the Symantec Root and Intermediate Certificate Authority (CA) Certificate.

• To download and install the Root and the Intermediate CA certificates, perform the steps from this link: SO4083
• Proceed with the certificate installation by following the steps from the same link.

Troubleshooting a Certificate Mismatch:
If the correct Root and Intermediate CA have been imported and the error continues, more than likely the issue is due to a certificate request mis-match. 
In order to resolve this, the correct certificate request must be located to install the corresponding certificate. 
NOTE: If this is not possible, a new Wallet should be created along with a new Certificate Signing Request.

Troubleshooting an SSL Certificate signed using the SHA2 (SHA-256) Signature Algorithm
Oracle Wallet Manager 10.x.x.x does not support SSL certificates signed with a SHA2 Signature Algorithm.  In order to support SHA2 certificates, you will need to upgrade to Oracle Wallet Manager 11.2.0.1.