postupgrade is not happening after portal for arcgis 10.9.1

[PrasadJ]

the Portal for ArcGIS is upgraded to 10.9.1 after upgrade the post upgrade is hand and unable to complete

Please suggest on the resolution

I am sending the logs o

[VirgilioPalmi]

from the logs I do not see anything in particular.
I'm wondering, are you using IE?
if so, I recommend using Chrome, Firefox or Edge.

[MichailMarinakis1]

Same problem here. We are using the new Microsoft Edge.  @JonathanQuinn can you please help? how can we trigger again the post upgrade window to our portal? To start the process again? 

Edit: Linking another post here: Upgrade high available portal from 10.8.1 to 10.9.1 in windows 

[MichailMarinakis1]

@PrasadJ we found a solution from our side. We had 2 issues:

1. During the "Continue upgrade" step, Microsoft Edge (and Chrome) was just showing a white page and we could not continue to import the license file. This was fixed by totally cleaning history and cache for the browsers. Also we had to wait for 2-3 minutes for the page to load properly... 
2. During the "Post upgrade" step. We run this step using the url of the external load balancer i.e https://loadbalancerportal.domain.com/arcgis/home instead of using the machine url. It failed. When we execute the post upgrade from the machine url and from the portaladmin page i.e https://portal.domain.com:7443/arcgis/portaladmin then it worked!

I hope you have found a solution for your case.