Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]

I was also facing the same issue.

Added the same dependency and it worked (like this):

<dependency>
    <groupId>javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.12.1.GA</version>
</dependency> 

When I ran into this error the fix was simple. I was simply missing a setter for a property. Make sure you define matching getters / setters for all your properties.

I know its an old question and lots of answers are helpful but in my case, I faced with the same error unluckily the reason was different. (Spring boot version 2.0.5.RELEASE) If you are using

IntelliJ idea 2018.1.5 or above and you set JDK version as JDK 11

the same exception occurred. After updating the

JDK version as 8

the error is gone.