After logged in SAM via web browser (IE /FireFox /Chrome ), the top page which is supposed to display STORAGE ARRAY LEVEL PERFORMANCE kept loading state and finally, the following error displayed.
Data could not be loaded from the storage array. One possible cause is the object on which you were performing the operation no longer exists. Other possible causes include network issues, inability to communicate with the controller or loss of power to the storage array. Check these causes and then retry the operation.
Both controller A and B have the same problem and rebooting management station OS (win10) didn't resolve the issue.
Also failed to collect CASD log via EMW->script editor with the following error.
Unable to save support data because the reservation request failed.
Retry this operation.
However, smcli worked well.