Request Approval for a Standard Change Proposal results in message "No Approver present. Please request System Administrator to configure Approvers."
The is present in any release where you have activated the 'Change Management - Standard Change Catalog' plugin (com.snc.change_management.standard_change_catalog).
This is the expected behavior if approvers have not been configured for your Standard Change Proposal process.
If you do not update the Standard Change Proposal...
...and you have removed the base system Change Management group from your instance...
...or you still have the original group and have removed all the members from it...
...the workflow will get to the Approval - Group activity, but it will not find any approvers and it will skip to the activity to produce the message.
To correct the behavior, do the following:
Edit the workflow, and ensure the Approval - Group activity has a valid group specified for the Approvers.
This group must have members, and the group must also have the role change_manager.
If the original Change Management group is still in your instance, make sure you add the users to the group.