Spring Cloud 2021.0.4 config server cannot get github repository

Question

I try to upgrade Spring cloud from 2021.0.3 to 2021.0.4, then I got the error like this:

Binding to target org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'spring.cloud.config.server.git' to org.springframework.cloud.config.server.environment.MultipleJGitEnvironmentProperties failed:

Reason: Property 'spring.cloud.config.server.git.privateKey' is not a valid private key

My application.yaml setting:

spring:
  cloud:
    config:
      server:
        git:
          search-paths: dev
          uri: git@github.com:myapp/config.git
          default-label: master
          force-pull: true
          passphrase: xxxxxxx
          ignore-local-ssh-settings: true
          private-key: |
            -----BEGIN RSA PRIVATE KEY-----
            xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
            -----END RSA PRIVATE KEY-----

this is my pom.xml setting like this:

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.3</version>
        <relativePath/>
    </parent>
    <groupId>myapp</groupId>
    <artifactId>config</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>config</name>
    <description>config-server</description>

    <properties>
        <java.version>17</java.version>
        <snakeyaml.version>1.32</snakeyaml.version>
        <spring-cloud.version>2021.0.4</spring-cloud.version>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

    </dependencies>

I don't change any setting in anything, just upgrade spring cloud version from 2021.0.3 to 2021.0.4.