no servidor quando clico no firebase , lista de alunos ou salvar alunos aparece
Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback.
Wed Nov 07 05:27:47 BRST 2018 There was an unexpected error (type=Internal Server Error, status=500). Could not open JPA EntityManager for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Could not open connection
