Cannot resolve org.assertj:assertj-core:3.23.1

As an AI language model, I do not have access to your specific project or environment, but in general, here are some possible solutions to resolve the error "Cannot resolve org.assertj:assertj-core:3.23.1":

1. Check your internet connection and make sure you have access to Maven Central repository where AssertJ is hosted.
2. If you are using Gradle, try refreshing your Gradle dependencies by running the "gradle clean build" command in your project directory.
3. If you are using Maven, try deleting your local Maven repository located in your home directory's ".m2" folder and run "mvn clean install" command to rebuild your project.
4. Verify that the AssertJ version you are using is correct and exists in the Maven Central repository. You can check this by going to Maven Central website and searching for the version of AssertJ you want to use.
5. Try using a different version of AssertJ by updating your dependency version in your build file (e.g. pom.xml or build.gradle file).
6. If none of the above solutions work, try adding the AssertJ repository to your build file. For example, in Gradle, add the following to your build.gradle file:

repositories {
    mavenCentral()
    maven { url 'https://jcenter.bintray.com' }
}

Again, keep in mind that these are general solutions and may not work for your specific situation. It's always a good idea to consult with your development team or seek help from online communities.