During "Apply Change" on Ops Manager version 3.0.41, when you click "Show Progress" button it does not display change or progress of the current deployment
You see similar to screenshot below where it is stuck at 0% and does not progress
but when you use "Review Changes" then "Apply Change", you can see that it is progressing.
So this means at the background there is no issue with the deployment. Alternatively you can also use bosh task or bosh tasks to verify deployment progress. Only the Ops manager UI "Show Progress" is affected.
Ops Manager v3.0.41
This is caused by a bug in Ops Manager v3.0.41 where in some cases, if one hits the "Show Progress" button from the "Applying Changes" page, the page will not load any content and one sees just the "blank" progress bar and an otherwise empty page.
If you are unable to upgrade Ops Manager, here are some workaround that you can use:
bosh task
bosh tasks
bosh task <id>
A fix will be included in a future release of Ops Manager.