Enable remember Multi-Factor Authentication
Sign in to the Azure portal.
On the left, select Azure Active Directory > Users.
Select Multi-Factor Authentication.
Under Multi-Factor Authentication, select service settings.
On the Service Settings page, manage remember multi-factor authentication, select the Allow users to remember multi-factor authentication on devices they trust option.
Set the number of days to allow trusted devices to bypass two-step verification. The default is 14 days.
Select Save.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-mfasettings

To resolve this you need to catch connection error. When the connection fails for webapp, it happens on web server, not within application. You can find out the web server log by below steps:
Open the web application --> Go to Application Service logs --> Go to Web server logging (there are multiple switches there) You can also see the errors live going to "Log stream" pane.
To ensure that you will get web server log, you have to enable it.

Reference:
https://docs.microsoft.com/en-us/azure/app-service/troubleshoot-diagnostic-logs

Reference:
https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview

Reference:
https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/lock-resources?tabs=json
https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/tag-resources?tabs=json