Rails 4.2.3 secret_key_base没有从secret设置。yml用于开发/测试环境，所有其他变量都被正确设置

I am running a Rails 4.2.3 application that runs in production when deployed and with environment variables set through Heroku. However, my development and test environments suddenly began failing with this error:I am running a Rails 4.2.3 application that run