The mongodb extension is installed but the MongoInt64 class cannot be found

Question

The mongodb extension is installed but the MongoInt64 class cannot be found. The mongodb extension is installed but the MongoInt64 class is not found. The mongodb extension is installed but the MongoInt64 class is not found. The mongodb extension is installed but the MongoInt64 class is not found. mongodb is installed. extension but the class MongoInt64 is not found. The mongodb extension is installed but the class MongoInt64 is not found. The mongodb extension is installed but the class MongoInt64 is not found. The mongodb extension is installed but the class MongoInt64 is not found.