Backup page blank when clicking "Back" button in CloudStack 4.21

[jeanvetorello]

I have fully configured the Backup Framework in CloudStack 4.21, including a working Backup Service Offering using a NAS provider.
The backups are created successfully — they appear correctly when using the API or CloudMonkey command list backups, and the job status is Completed.

Steps to Reproduce

Log in to the CloudStack Primate UI version 4.21.0
Go to Instances → select a VM → Backups tab.
Click on a specific backup to open its details.
Click Back (top-left corner).
Observe: the entire page turns white and no content reloads.

[abh1sar]

@jeanvetorello could this be browser caching issue?
Could you please try the steps again in a private window?

Do the backups show up in Storage->Backups section?

[jeanvetorello]

logs.zip
fallow the har and console logs zip

[abh1sar]

Hi @jeanvetorello the api response looks ok. Not sure of the error yet. Can you please check the output of the below cmk commands

set debug true
list backups listvmdetails=true

[jeanvetorello]

listbackup.txt
follow the output @abh1sar

[abh1sar]

Thanks for the details @jeanvetorello. I have raised #11900 to fix this