Error trying to run sh scripts/run_AMLSim.sh conf.json

[samjozz]

I tried running run_AMLSim.sh but it is showing this error:
[ERROR] Failed to execute goal on project amlsim: Could not resolve dependencies for project amlsim:amlsim:jar:1.0.0: The following artifacts could not be resolved: mason:mason:jar:20 (absent): mason:mason:jar:20 was not found in https://repo.maven.apache.org/maven2 during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of central has elapsed or updates are forced.

Does anyone know how to fix it? Should I add anything in POM.XML?