The server time zone value 'E. South America Standard Tim' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) code example
Example: com.mysql.cj.exceptions.InvalidConnectionAttributeException more than one time zone. You must configure either the server or JD value if you want to utilize time zone support.
spring.datasource.url=jdbc:mysql://localhost/db_name?useTimezone=true&serverTimezone=UTC