Application not starting up due to postgres db drivers not found error

Question

Am trying to deploy mulesoft application thourgh maven to cloudhub. It got deployed successfully, but the application start up gives errors. I verified the POM file and dependency jars related to postgres and all were in place.

Please help to resole this issue

POM file

<sharedLibraries>
     <sharedLibrary>
            <groupId>org.postgresql</groupId>
                            <artifactId>postgresql</artifactId>
                        </sharedLibrary>
                </sharedLibraries>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>42.2.5</version>
        </dependency>

Error:

Caused by: java.sql.SQLException: Error trying to load driver: org.postgresql.Driver : Cannot load class 'org.postgresql.Driver': [
    org.postgresql.Driver, 
    Cannot load class 'org.postgresql.Driver': [
    Class 'org.postgresql.Driver' has no package mapping for region 'domain/default/app/loggingframework-app-dev'., 
    Cannot load class 'org.postgresql.Driver': [
    org.postgresql.Driver, 
    Class 'org.postgresql.Driver' not found in classloader for artifact 'container'.]]]