Exceptions not captured in opencsv parsing - spring-boot

Question

I'm trying to parse a csv file and map it onto a data class. I've setup some validations for the columns and I'm testing it by sending incorrect values for those columns. opencsv throws a generic exception
Basic instantiation of the given bean type (and subordinate beans created through recursion, if applicable) was determined to be impossible.
Code details
Data class:
data class UserInfo(
#CsvBindByName(column = "Id", required = true) val id: Long,
#CsvBindByName(column = "FirstName", required = true) val firstName: String,
#CsvBindByName(column = "LastName", required = true) val lastName: String,
#CsvBindByName(column = "Email", required = true) val email: String,
#CsvBindByName(column = "PhoneNumber", required = true) val phoneNumber: String,
#PreAssignmentValidator(
validator = MustMatchRegexExpression::class, paramString = "^[0-9]{10}$")
#CsvBindByName(column = "Age", required = true)
val age: Int
)
csv parsing logic
fun uploadCsvFile(file: MultipartFile): List<UserInfo> {
throwIfFileEmpty(file)
var fileReader: BufferedReader? = null
try {
fileReader = BufferedReader(InputStreamReader(file.inputStream))
val csvToBean = createCSVToBean(fileReader)
val mappingStrategy: HeaderColumnNameMappingStrategy<Any> =
HeaderColumnNameMappingStrategy<Any>()
mappingStrategy.type = UserInfo::class.java
val userInfos = csvToBean.parse()
userInfos.stream().forEach { user -> println("Parsed data:$user") }
csvToBean.capturedExceptions.stream().forEach { ex -> println(ex.message) }
return userInfos
} catch (ex: Exception) {
throw CsvImportException("Error during csv import")
} finally {
closeFileReader(fileReader)
}
}
private fun createCSVToBean(fileReader: BufferedReader?): CsvToBean<UserInfo> =
CsvToBeanBuilder<UserInfo>(fileReader)
.withType(UserInfo::class.java)
.withThrowExceptions(false)
.withIgnoreLeadingWhiteSpace(true)
.build()
I'm looking for the proper error message for the validation / missing field so that I can communicate it to the error response.