I tried to recreate your pom.xml via Spring Initializr and the following pom.xml manages to start the SpringBootApplication successfully. You can cross-check it with yours, just some quick points:

• spring-boot-starter is not needed since you have spring-boot-starter-web

• spring-cloud-starter-bootstrap is not required (at least Spring Initializr didn't put it along with spring-cloud-starter-config

• I didn't include spring-batch-test and spring-security-test since it doesn't seem that you use the relevant starters.

    <?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.5.4</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>
        <groupId>com.example</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>demo</name>
        <description>Demo project for Spring Boot</description>
        <properties>
            <java.version>11</java.version>
            <spring-cloud.version>2020.0.3</spring-cloud.version>
        </properties>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-config</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            <!--        runtime dependencies -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <!--        test dependencies -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
  
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
  
    </project>
  

Moreover it needed to add the following line in the appplication.properties file:

spring.config.import=optional:configserver:

To fix it you should declare version of org.springframework.cloud that you are going to use.

To fix it just add next ones in your build.gradle

ext {
    set('springCloudVersion', "2022.0.4") // 2022.0.4 is the latest one.
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
    }
}

Or to your newest dependencies set also version :

implementation 'org.springframework.cloud:spring-cloud-starter-config:4.0.4'
implementation 'org.springframework.cloud:spring-cloud-starter:4.0.4'
implementation 'org.springframework.cloud:spring-cloud-starter-bootstrap:4.0.4'

Also 4.0.4 is the latest one.