Dependency 'org.apache.rocketmq:rocketmq-client:4.9.3' not found

As an AI language model, I don't have access to your system environment to check the exact reason behind the error. However, here are a few possible reasons and solutions for the error message "Dependency 'org.apache.rocketmq:rocketmq-client:4.9.3' not found":

1. Incorrect Maven repository configuration - Check your Maven settings.xml file and ensure that the correct repository is added to the configuration. You can try adding the following repository to your settings.xml file:

   <repositories>
      <repository>
         <id>apache-snapshots</id>
         <url>https://repository.apache.org/content/repositories/snapshots/</url>
      </repository>
   </repositories>

2. Network connectivity issues - Check your internet connection and ensure that you can access the required repository. You can also try running the command "mvn clean install -U" to force an update of all dependencies.

3. Incorrect dependency version - Check if the correct version of the dependency is specified in your pom.xml file. You can try updating the version to the latest stable release.

   <dependency>
      <groupId>org.apache.rocketmq</groupId>
      <artifactId>rocketmq-client</artifactId>
      <version>4.9.3</version>
   </dependency>

4. Missing dependency - Check if the dependency is missing from your local Maven repository. You can try deleting the local repository folder and running the command "mvn clean install" to download all required dependencies again.

If none of the above solutions work, you can try searching for the specific error message on the official Apache RocketMQ documentation or forums to get more help from the community.