Hi,
I'm trying to follow the Geoevent Developer Guide to run the samples. But meet a problem while trying to run the "mvn clean install" with sample "sample-adapter":

Is it because of maven version stated in the pom.xml is too old? (The maven I installed is version 3.6.2, the eclipse version is 4.13, the m2e version is the latest 1.13).
Has anyone meet the same problem and maybe have a suggestion?
Thank you so much for your help!