Could not resolve dependencies

[guilhermepolicarpo]

I'm trying to generate the AMP for the project (with comand 'mvn clean package'), but it's giving an error.

The error:
[ERROR] Failed to execute goal on project esign-cert-repo: Could not resolve dependencies for project es.keensoft.alfresco:esign-cert-repo:amp:1.7.2: Could not find artifact org.springframework.social:spring-social-facebook:jar:1.0.0.RC1 in alfresco-public (https://artifacts.alfresco.com/nexus/content/groups/public) -> [Help 1]

How can I solve this issue?