The Apex class doesn't appear to be implementing the Queueable interface.

Hello Parise , 

Did you followed the base approach for writing queueable interface : 

https://developer.salesforce.com/docs/atlas.en-us.232.0.apexref.meta/apexref/apex_class_System_Queueable.htm

If you get any error ,  what is the error you are encountering ? 

Thanks

Nav