IDX10803: Unable to create to obtain configuration from OpenIdConnect

I am using OpenIdConnect for Authentication with Azure AD. The application is hosted on IIS. I got below exception few days back:

IDX10803: Unable to create to obtain configuration from: 'https://login.microsoftonline.com/common/.well-known/openid-configuration'.

Stack Trace is: at Microsoft.IdentityModel.Protocols.ConfigurationManager`1.d__3.MoveNext()

After 30 to 40 mins the application automatically started working normally. I want to know the possible reasons for above exception. Is it a network issue or any specific reason. Thanks.