No converter found capable of converting from type [java.lang.String] to type [org.springframework.expression.Expression] #2189

spring:
  cloud:
    stream:
      bindings:
        inputMail:
          destination: ${rabbitmq.mail.exchange}
          group: ${rabbitmq.mail.queue}
          binder: rabbitMail
          consumer:
            maxAttempts: 1
        retryMail:
          destination: ${rabbitmq.mail.exchange}
          binder: rabbitMail
        dlqMail:
          destination: ${rabbitmq.mail.dlx}
          binder: rabbitMail
      binders:
        rabbitMail:
          type: rabbitMail
          environment:
            spring:
              cloud:
                stream:
                  rabbit:
                    bindings:
                      inputMail:
                        consumer:
                          autoBindDlq: true
                          queueNameGroupOnly: true
                          exchangeAutoDelete: false
                          deadLetterExchange: ${rabbitmq.mail.dlx}
                          delayedExchange: true
                      retryMail:
                        producer:
                          declareExchange: false
                          exchangeAutoDelete: false
                          delayExpression: 300000 # 5min
                      dlqMail:
                        producer:
                          declareExchange: false
                          exchangeAutoDelete: false
                          routingKeyExpression: '''${rabbitmq.mail.queue}'''