UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.NotBlank' validating type 'java.math.BigDecimal'. Check configuration for 'education' at org.hibernate.validator.internal.engine.constrain...

This exception is thrown when trying to validate a BigDecimal value using the @NotBlank constraint, which is meant for validating strings. The error message suggests that the configuration for the validation might be incorrect, as it cannot find a validator for this combination of constraint and data type.

To fix this issue, you should use a constraint that is appropriate for validating numeric values, such as @NotNull , @Positive , or @Negative . You should also ensure that your validation configuration is set up correctly to handle these constraints and data types.