org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of

This exception is thrown when Spring is unable to convert the value of a request parameter or path variable to the expected type.

There are several possible causes for this exception:

1. The request parameter or path variable is missing or has an empty value.
2. The expected type is not compatible with the actual type of the request parameter or path variable.
3. The conversion service does not support the conversion from the actual type to the expected type.

To resolve this issue, you can try the following steps:

1. Check if the request parameter or path variable is present in the request and has a valid value.
2. Check if the expected type is correct and compatible with the actual type of the request parameter or path variable.
3. If the conversion service does not support the conversion, you can implement a custom converter or use a third-party library that supports the conversion.

You can also refer to the Spring documentation for more information on how to handle this exception.