updated yaml and php.ini

app.yaml

@@ -13,3 +13,7 @@ handlers:
 # Set bucket name
 env_variables:    
     GOOGLE_STORAGE_BUCKET: "wbt2020"
+
+runtime_config:
+        root: .
+        enable_stackdriver_integration: true

composer.json

@@ -12,7 +12,8 @@
 	},
 	"require": {
 		"php": ">=7.2",
-		"google/cloud-storage": "^1.0"
+		"google/cloud-storage": "^1.0",
+		"google/cloud-error-reporting": "^0.16.2"
 	},
 	"suggest": {
 		"paragonie/random_compat": "Provides better randomness in PHP 5.x"

php.ini

 extension=memcached.so
+auto_prepend_file='vendor/google/cloud-error-reporting/src/prepend.php'