To Support you further on this issue, Could you please provide the following details.
1.Support bundle: This would be available when you navigate through the following path in System manager browser. help ->Support bundle . Generate the support bundle and provide us with the same.
2. Please take a screen shot when you are seeing this issue and provide us with the same. Does the loading symbol circle that you have mentioned loads forever or does it stop after a while displaying a blank page.
3. Could you please check the snap vault schedule details on the storage system where you are seeing the issue, using Ontap Command line interface using the below command.
snapvault snap sched
4. Ontap version: This can be obtained by seeing the system manager Dashboard page where you would see all the added systems and their details OR using Ontap CLI below:
Re: oncommand system manager does not load snapvault schedule