I'm working with the Google Ads API and trying to run the GetCampaigns.php example from the official repository. The authentication works fine, but when I try to execute the searchStream() method to retrieve campaigns, I get warnings about gRPC channels being maxed out, and the process stops. This is the file

The error log shows the following:

 WARNING: All log messages before absl::InitializeLog() is called are written to STDERR I0000 00:00:1727872579.980136   22500 channel.c:277] [Warning] Target upper bound: 1. Current size: 1. I0000 00:00:1727872579.980178   22500 channel.c:280] [Warning] Target googleads.googleapis.com:443 will not be persisted. 

I tried debugging the code, and the execution stops at this line:

$stream = $googleAdsServiceClient->searchStream(     SearchGoogleAdsStreamRequest::build($customerId, $query) ); 

I also tried increasing the number of gRPC channels by setting the following environment variable, but it didn't solve the issue:

putenv('GRPC_DEFAULT_MAX_CHANNELS=10');