**Your client library and Google Ads API versions:

• Client library version: v27.2.0

• Google Ads API version: V19

Google\Ads\GoogleAds\Lib\V19\GoogleAdsClient

Description of the bug:
Stack trace:
#0 [internal function]: Google\ApiCore\CredentialsWrapper->{closure:Google\ApiCore\CredentialsWrapper::getAuthorizationHeaderCallback():244}()
#1 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/grpc/grpc/src/lib/UnaryCall.php(43): Grpc\Call->startBatch()
#2 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/grpc/grpc/src/lib/BaseStub.php(295): Grpc\UnaryCall->start()
#3 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/googleads/google-ads-php/src/Google/Ads/GoogleAds/Lib/V19/GoogleAdsFailuresInterceptor.php(48): Grpc\BaseStub->{closure:Grpc\BaseStub::_GrpcUnaryUnary():273}()
#4 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/grpc/grpc/src/lib/BaseStub.php(426): Google\Ads\GoogleAds\Lib\V19\GoogleAdsFailuresInterceptor->interceptUnaryUnary()
#5 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/googleads/google-ads-php/src/Google/Ads/GoogleAds/Lib/V19/GoogleAdsLoggingInterceptor.php(60): Grpc\BaseStub->{closure:Grpc\BaseStub::_UnaryUnaryCallFactory():421}()
#6 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/grpc/grpc/src/lib/BaseStub.php(426): Google\Ads\GoogleAds\Lib\V19\GoogleAdsLoggingInterceptor->interceptUnaryUnary()
#7 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/grpc/grpc/src/lib/BaseStub.php(545): Grpc\BaseStub->{closure:Grpc\BaseStub::_UnaryUnaryCallFactory():421}()
#8 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Transport/GrpcTransport.php(267): Grpc\BaseStub->_simpleRequest()
#9 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/GapicClientTrait.php(664): Google\ApiCore\Transport\GrpcTransport->startUnaryCall()
#10 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/CredentialsWrapperMiddleware.php(60): Google\Ads\GoogleAds\V19\Services\Client\GoogleAdsServiceClient->{closure:Google\ApiCore\GapicClientTrait::createCallStack():662}()
#11 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/FixedHeaderMiddleware.php(67): Google\ApiCore\Middleware\CredentialsWrapperMiddleware->__invoke()
#12 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/RetryMiddleware.php(97): Google\ApiCore\Middleware\FixedHeaderMiddleware->__invoke()
#13 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/RequestAutoPopulationMiddleware.php(73): Google\ApiCore\Middleware\RetryMiddleware->__invoke()
#14 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/OptionsFilterMiddleware.php(60): Google\ApiCore\Middleware\RequestAutoPopulationMiddleware->__invoke()
#15 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/PagedMiddleware.php(65): Google\ApiCore\Middleware\OptionsFilterMiddleware->__invoke()
#16 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/Middleware/FixedHeaderMiddleware.php(67): Google\ApiCore\Middleware\PagedMiddleware->__invoke()
#17 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/googleads/google-ads-php/src/Google/Ads/GoogleAds/Lib/V19/UnaryGoogleAdsExceptionMiddleware.php(61): Google\ApiCore\Middleware\FixedHeaderMiddleware->__invoke()
#18 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/googleads/google-ads-php/src/Google/Ads/GoogleAds/Lib/V19/UnaryGoogleAdsResponseMetadataCallable.php(53): Google\Ads\GoogleAds\Lib\V19\UnaryGoogleAdsExceptionMiddleware->__invoke()
#19 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/GapicClientTrait.php(856): Google\Ads\GoogleAds\Lib\V19\UnaryGoogleAdsResponseMetadataCallable->__invoke()
#20 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/GapicClientTrait.php(813): Google\Ads\GoogleAds\V19\Services\Client\GoogleAdsServiceClient->getPagedListResponseAsync()
#21 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/google/gax/src/GapicClientTrait.php(572): Google\Ads\GoogleAds\V19\Services\Client\GoogleAdsServiceClient->getPagedListResponse()
#22 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/google-ads-php/V27/vendor/googleads/google-ads-php/src/Google/Ads/GoogleAds/V19/Services/Client/GoogleAdsServiceClient.php(1785): Google\Ads\GoogleAds\V19\Services\Client\GoogleAdsServiceClient->startApiCall()
#23 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/googleads/bids/googleads_V2.php(226): Google\Ads\GoogleAds\V19\Services\Client\GoogleAdsServiceClient->search()
#24 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/googleads/bids/googleads_V2.php(134): googleads_send_bids::get_geo_target_constant()
#25 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/googleads/bids/googleads_send_bids_V2.php(235): googleads_send_bids::send_googleads_request()
#26 /home/didier-roy/dmp_google_hotel_ads_campaign_service/legacy-bids/googleads/bids/crontab_googleads_send_bids_debug.php(28): googleads_send_bids::main()

Steps to reproduce:

Expected behavior:

Request/Response Logs:
No request sent

Anything else we should know about your project / environment: