我在生产模式下运行Play 2.4服务器时遇到此错误:
play.api.UnexpectedException: Unexpected exception[ProvisionException: Unable to provision, see the following errors:
1) Error in custom provider, @6mh5cjo5l: Configuration error
while locating play.api.libs.CryptoConfigParser
while locating play.api.libs.CryptoConfig
...
Caused by: play.api.PlayException: Configuration error[Application secret not set]
怎么修？