I am trying to use activiti with spring boot 3, but it seems it is not compatible yet.
I found this link https://activiti.gitbook.io/activiti-7-developers-guide/releases/8.0.0 where it says it is possible to add alfresco nexus as a repository in the pom file and that would solve the issue.

<repositories>
  <repository>
    <id>activiti-releases</id>
    <url>https://artifacts.alfresco.com/nexus/content/repositories/activiti-releases</url>
  </repository>
</repositories>

But when I do so. I get this error PkIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException

From what I understand, I need a certificate to use the alfresco repository.

How can I get the certificate ?

I tried to look for some credentials to add them into the settings.xml file but I found nothing