@bigboss97, that’s not a fun error to get , 
This could be several things,
Here is a link to several solutions to a similar problem, java - Android ClassNotFoundException: Didn't find class on path - Stack Overflow
It could also be a conflict between the name of your package in the AndroidManifest.xml, look at this, Android ClassNotFoundException: Didn't find class on path - Stack Overflow
I’m sure it’s a simple fix but can’t know without your full project.