JBoss AS Error: WFLYCTL0013 - NullPointerException in 'microprofile-metrics-smallrye' Subsystem

This error message indicates that an 'add' operation has failed in the 'microprofile-metrics-smallrye' subsystem of the JBoss application server. The cause of the failure is a 'NullPointerException', which means that the application server tried to access a null object or variable.

To resolve this issue, you should check the configuration of the 'microprofile-metrics-smallrye' subsystem and make sure that all required dependencies and resources are properly configured and available. Additionally, you may need to review the server logs and stack trace to identify the specific cause of the NullPointerException and address it accordingly.