[teiid-designer-users] There is no MySQL JDBC connection in Teiid Designer 8.3.1

Hello, I'm met with a problem when upgrade Teiid Designer from 8.3 to 8.3.1. After this upgration, I can not craete a MySQL JDBC connection. In the Connection Profile Types list, there are only three types: Generic JDBC, ModeShape and Teiid. But there should be many types here in normal case. Is this a bug in 8.3.1? Thanks very much for your help. PS: The forum(https://community.jboss.org/en/teiiddesigner/) can not be used, I was stuck in the same page even when I click other links. Have you met with that? Best wishes biaobaioqi