Subscriber callback inside class not recognized C++

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I have created a class that contains a ROS subscriber and the callback function. I have done this following the ROS tutorial and according to other answers that I have found (for example here).

I have included a snippet of my code below:

class VelocityCommandSubscriber{
public:
    geometry_msgs::Twist velocity_msg;
    std::string velocity_type;
    VelocityCommandSubscriber(geometry_msgs::Twist velocity_msg, std::string velocity_type)
    {
        velocity_msg = velocity_msg;
        velocity_type = velocity_type;
        velocitySubscriber = nH.subscribe<std_msgs::Float64>("/command_velocity_"+velocity_type,10, &VelocityCommandSubscriber::VelocityCallback, this);
    }
    void VelocityCallback(std_msgs::Float64::ConstPtr& velocity_cmd_msg)
    {
        //Callback code here
    }
protected:
    ros::NodeHandle nH;
    ros::Subscriber velocitySubscriber;
};

However, whenever I run this code I get the following error

error: no matching function for call to ‘ros::NodeHandle::subscribe<std_msgs::Float64>(std::__cxx11::basic_string<char>, int, void (VelocityCommandSubscriber::*)(std_msgs::Float64_<std::allocator<void> >::ConstPtr&), VelocityCommandSubscriber*)’
   81 |             velocitySubscriber = nH.subscribe<std_msgs::Float64>("/command_velocity_"+velocity_type,10, &VelocityCommandSubscriber::VelocityCallback, this); |

Does anyone know what am I doing wrong? I am using ROS noetic and am relatively new to ROS and c++ so I may very well be reading over something simple.

Thanks for your help!