Microsoft Teams : Unable to add the domains in external access

Hello All

Hope eveyone is doing great. am looking for the help from MS teams experts for one of my issues facing in Teams admin portal

My tenant is not open to extrenal domains, and its restricted to only allowed external domains for chat and calling funtionality.

All of sudden, am unbale to add any of the domains in externals access via teams admin portal (GUI)

its not allowing me to click DONE to save the changes further.

please find the screenshot

however i can able to add it via powershell

Ramki: 02/29/2024 14:42:15>$Domain = "orange.in"
Ramki: 02/29/2024 14:43:27>Set-CsTenantFederationConfiguration -AllowedDomainsAsAList @{Add=$Domain}
Ramki: 02/29/2024 14:43:30>$Domain = "orange.com"
Ramki: 02/29/2024 14:44:01>Set-CsTenantFederationConfiguration -AllowedDomainsAsAList @{Add=$Domain}

i have tried differnt browser and different system, No luck.