Hi @IniobongNkanga-8038,
Based on your description, you are getting the error "We cannot create the group. An exception of type 'Microsoft.Online.BOX.Util.Exceptions.InternalException' was thrown.while trying to create the email group Error.
I suggest you try the following methods:
1.Clear your browser cache and cookies, and then log in to the Exchange Admin Center again.
2.Try using a different browser or access the EAC in incognito/private mode.
3.Please check if you have the issue when change in EAC. Make sure your account has sufficient permissions to create groups. You may need the Exchange Administrator or Global Administrator role.
4.Please help check if other admin have the same issue when creating groups.
5.Try creating an email group using the Exchange Online Management Shell. This can provide more detailed error information:
New-DistributionGroup -Name "Group Name" -Alias "groupalias" -PrimarySmtpAddress "[email protected]"