I am new to Always on HA groups in SQL server. We are using SQL server 2016 STD, we have setup windows clustering and have created an Availability Group. See the attached screen show of my error. The primary database shows as connected and the secondary is in a disconnected state. I also get the warning that the Availability Replica in not Joined. I think it may be a login permission, but I am unsure how to resolve the issue.
Any help would be appreciated.