Wrong constructor in ROS2

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I am trying to create a constructor for my odom node but for some reason I keep getting the strange error:

 error: no matching function for call to ‘rclcpp::TimeSource::TimeSource(<brace-enclosed initializer list>)’
 odom_pub{}, _odom_tb{std::make_shared<tf2_ros::StaticTransformBroadcaster>(shared_from_this())}

The thing is that I am not even trying to pass the rclcpp::TimeSource but my compiler thinks so. I think i managed to follow the variable declaration = variable initialization order, so for example in my header:

class OdomNode : public rclcpp::Node
{

private:
    int _rate, _ticks_meter, _left_pos, _right_pos, _enc_left, _enc_right, _lmult, _rmult;
    int _prev_rencoder, _prev_lencoder;
    double _d_left, _d_right;
    std::shared_ptr<tf2::Quaternion> q;
    std::string _base_frame_id, _odom_frame_id;

    //Node
    rclcpp::TimeSource _ts;
    rclcpp::Clock::SharedPtr _clock;
    std::shared_ptr<geometry_msgs::msg::TransformStamped> _odom_ts;
    rclcpp::Rate _loop_rate;
    rclcpp::Time _then;

    // Subs and publishers:
    //rclcpp::Subscriber _left_sub;
    std::shared_ptr<rclcpp::Publisher<nav_msgs::msg::Odometry>> _odom_pub;
    std::shared_ptr<tf2_ros::StaticTransformBroadcaster> _odom_tb;

    // Known vars:
    double _x{0};
    double _y{0};
    double _th{0};
    std::vector<double> _q_imu{0,0,0,1};
    std::shared_ptr<std_msgs::msg::Float64> _state_left, _state_right;

And my cpp file:

OdomNode::OdomNode() : Node("odometry_node","odometry_node_ns", rclcpp::NodeOptions()), _rate(30), _ticks_meter(1), _left_pos{0},
                       _right_pos{0}, _enc_left{0}, _enc_right{0}, _lmult{0},
                       _rmult{0}, _prev_rencoder{0}, _prev_lencoder{0},
                       _d_left{0}, _d_right{0}, q{std::make_shared<tf2::Quaternion>()},
                       _base_frame_id{"base_footprint"}, _odom_frame_id{"odom"},
                       _ts{this}, _clock{std::make_shared<rclcpp::Clock>(RCL_ROS_TIME)},
                       _odom_ts{std::make_shared<geometry_msgs::msg::TransformStamped>()}, _loop_rate{30},
                       _then{}, _odom_pub{}, _odom_tb{std::make_shared<tf2_ros::StaticTransformBroadcaster>(shared_from_this())}
{}