问Gitlab的工作卡住了，没有积极的跑步者，为什么？

EN

This job is stuck because of one of the following problems. There are no active runners online, no runners for the protected branch , or no runners that match all of the job's tags: build-docker-image
Go to project CI settings

stages:
  - build-app
  - test
  - build-docker-image
  - deploy-develop
  - deploy-staging
  - deploy-prod

variables:
  APP: myapp

##########################################
# Build
##########################################
build-app:
  stage: build-app
  image:
    name: mirror.gcr.io/library/maven:3.8.4-openjdk-17
  variables:
    GIT_DEPTH: 5
  cache:
    key: Maven
    paths:
      - .mvn/
  artifacts:
    paths:
      - target/myapp-*.jar
    expire_in: 1 month
  tags:
    - build
  script:
    - mvn -DskipTests -Dmaven.repo.local=$(pwd)/.mvn package

##########################################
# Test
##########################################
test:
  stage: test
  image:
    name: mirror.gcr.io/library/maven:3.8.4-openjdk-17
  variables:
    GIT_DEPTH: 51
  cache:
    key: Maven
    paths:
      - .mvn/
  artifacts:
    paths:
      - target/myapp-*.jar
    expire_in: 1 month
  tags:
    - build
  script:
    - mvn test -Dmaven.repo.local=$(pwd)/.mvn test

##########################################
# Build Docker Image
##########################################
build-docker-image:
  stage: build-docker-image
  variables:
    GIT_DEPTH: 5
  image:
    name: gcr.io/kaniko-project/executor:debug
    entrypoint: [""]
  dependencies:
    - build-app
  tags:
    - build-docker-image
  script:
    - mkdir -p /kaniko/.docker
    - echo $GCP_DOCKER | base64 -d > /kaniko/.docker/config.json
    - >-
      /kaniko/executor
      --context "${CI_PROJECT_DIR}"
      --dockerfile "${CI_PROJECT_DIR}/Dockerfile"
      --destination "us.gcr.io/mycompany-ops/${CI_PROJECT_NAME}:${CI_COMMIT_SHORT_SHA}"
      --build-arg GIT_SHA=${CI_COMMIT_SHORT_SHA}
      --build-arg GIT_TAG=${CI_COMMIT_TAG}
      --build-arg BUILT_ON="$(date)"
  when: 
#  only:
#    - main