Hi @Pramod Valavala
I solved this issue. Thank you for your advising.
It look that the cause of this issue was fecthing tenants error.
<solution>
1.clearing cookies and cache from the browse. Also change blowser from firefox to chrome incognito browser
2.I access to azure portal from below URL.
"https://portal.azure.com/#@yourOrg.onmicrosoft.com"
Then, change to my tenant, there is no error.
I'm not sure why error can be resolved by changing access URL. However issue was resolved.