Fixed the version
MODIFY
adapters/Facebook/FacebookAdapter/GADMAdapterFacebookConstants.h
adapters/Facebook/FacebookAdapter/GADMAdapterFacebookConstants.h
// limitations under the License.
/// Facebook mediation network adapter version.
-static NSString *const kGADMAdapterFacebookVersion = @"5.9.0.1";
+static NSString *const kGADMAdapterFacebookVersion = @"5.9.0.0";
static NSString *const kGADMAdapterFacebookOpenBiddingPubID = @"placement_id";

Fixed the version