NoClassDefFoundError error when running locally only

Im getting the following error below

Ive added the following dependency and the code compiles...Im getting this even when commenting out the code where the error says its failing....

It woks when I deploy on Heroku but fails when running locally....

Any idea? Im lost....

My dependency:

        <dependency>
        <groupId>com.sendgrid</groupId>
        <artifactId>sendgrid-java</artifactId>
        <version>4.2.0</version>
    </dependency>