https://rapi.tools.ops.smartbear.io/maven2/ not available

I am trying to do some automation and while doing so I am trying to do a mvn clean install.

I am getting below error:

Failed to collect dependencies at com.smartbear.soapui:soapui-maven-plugin:jar:5.6.0: Failed to read artifact descriptor for com.smartbear.soapui:soapui-maven-plugin:jar:5.6.0: Could not transfer artifact com.smartbear.soapui:soapui-project:pom:5.6.0 from/to soapui-repo (https://rapi.tools.ops.smartbear.io/maven2😞 transfer failed for https://rapi.tools.ops.smartbear.io/maven2/com/smartbear/soapui/soapui-project/5.6.0/soapui-project-5.6.0.pom, status: 503 Service Temporarily Unavailable -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

When checked the nexus repository there is no https://rapi.tools.ops.smartbear.io/nexus/content/groups/public/maven2 folder.

Could someone please help to create that structure.

Thanks,

Santanu