Solutions to C++ error: request for member 'variableName' in '(LinkedList*)this', which is of pointer type 'LinkedList*' (maybe you meant to use '->' ?)

What is the error of the following program?

#include <iostream>

using namespace std;

template <typename T>

class LinkedList

{

private:

    string variableName = "";

public:

    void setVariableName(string variableName)

    {

        this.variableName = variableName;

        cout << "You cannot let the \"this\" pointer "

             << "to use the dot operator \".\", "

             << "change to the right arrow operator instead" << endl;

    }

}; // put semicolon or else error: expected ';' after class definition

int main(int argc, char* argv[])

{

    LinkedList<int> linkedList;

    linkedList.setVariableName("variableName");

    return 0;

}

Solutions:
take note that the dot operator or "." cannot be used for
the "this" pointer

warning: In instantiation of 'void LinkedList<T>::setVariableName(std::__cxx11::string)
[with T = int; std::__cxx11::string = std::__cxx11::basic_string<char>]':
warning continued: required from here
error: request for member 'variableName' in '(LinkedList<int>*)this',
which is of pointer type 'LinkedList<int>*' (maybe you meant to use '->' ?)

error: request for member 'variableName' in '(LinkedList<int>*)this',
which is of pointer type 'LinkedList<int>*' (maybe you meant to use '->' ?)
Solution:
dot operator error at the "this" pointer
you cannot use the dot operator or "." for the "this" pointer,
change to the right arrow operator or ->