When sending MQ using an application of WAS, you encounter the following error:
The certificate issued by CN=DigiCert High Assurance EV Root CA, OU=www.digicert.com, O=DigiCert Inc, C=US is not trusted; internal cause is:
Java. Security. Cert. CertPathValidatorException: Certificate chaining the error
This means that a pilot entry certificate is required to WAS:
Import steps:
1: Click the WAS menu security-& GT; SSL Certificate and Key Management see the following page:

Click Key Stores and Certificates on the page and click after entering the page

3 click NodeDefaultTrustStore

Click Signer Certificates from the appear page

5. Click the Add button in the display page:

6. First upload the file to /opt/root.cert, then enter a certificate name: MyRootCert. Click the Aplly button, and then click the Ok button.
Certificate import is complete.

After trying to send MQ, success.