HI,

Seems like these errors are not connected to your plugin. It may be an environement issue - such as a mismatch between vSphere Client and vCenter Server versions, JAVA version etc.

Could you provide more information about the version and type of your vSphere Client and the vCenter Server that the client is registered with as well as your JAVA version.

In addition, do you experience any problems with deployment/functionality of your plugin on a 6.7 environment?

Best Regards,

Denis