Adwords Api Integration Error

Hi Google Adwords Api Team,

I am new to adwords api. I have done all settings by using developer token and php client library but when I am trying to access the adwords-examples/examples/AdWords/v201605/CampaignManagement/GetCampaignsByLabel.php through web browser I am getting following error.

An error has occurred: [InternalApiError.UNEXPECTED_INTERNAL_API_ERROR @ com.google.ads.api.services.common.error.InternalApiError.(InternalApiErro]

Would you please check this as early as possible?

Regards
Yasir Mehmood

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