How to put characters from file into two-dimensional vector?

I've been trying to read in characters from an external file to be put into a two-dimensional vector with type char. The elements must be able to be compared to certain values in order to navigate a maze given in "MazeSample.txt".

While I haven't been able to get characters be put into the vector, I was able to read and output the characters with the get and cout functions. The following code is an attempt to read the vectors in the correct format, but provides an error in the end:

//MazeSample.txt
SWWOW
OOOOW
WWWOW
WEOOW

//source.cpp
vector<vector<char>> maze;
ifstream mazeFile;
char token;

mazeFile.open("MazeSample.txt");

while (!mazeFile.eof()) {
    mazeFile.get(token); //reads a single character, goes to next char after loop

    for (int row = 0; row < maze.size(); row++) {
        for (int column = 0; column < maze.at(row).size(); row++) {
            maze.push_back(token);
        }
    }

    //cout << token;
}

mazeFile.close();

For the maze provided in "MazeSample.txt", I'd expect the maze vector to read each character row by row, mimicking the format of the maze sample.

In the above code, am provided with an error at maze.push_back(token): "no instance of overloaded function "std::vector<_Ty, _Alloc>::push_back..." matches the argument list" "argument types are: (char)" "object type is: std::vector>, std::allocator>>>"