Specify line breaks in chapter headers

I created my own .cls file for my thesis and I’m getting an error message when I specify line breaks in my chapter titles

Here is the section in the file that defines the chapter heading:

%----------------------------------------------------------------------%
%   Chapter heading font size
%----------------------------------------------------------------------%

RequirePackage{sectsty}

chapternumberfont{normalsize} 
chaptertitlefont{normalsize}


%----------------------------------------------------------------------%
%   Title spacing
%----------------------------------------------------------------------%

RequirePackage{titlesec} % Adjust title headers

% Reduce spacing after section/subsection/subsubsections
titlespacingsection{0pt}{12pt plus 4pt minus 2pt}{0pt plus 2pt minus 2pt}
titlespacingsubsection{0pt}{12pt plus 4pt minus 2pt}{0pt plus 2pt minus 2pt}
titlespacingsubsubsection{0pt}{12pt plus 4pt minus 2pt}{0pt plus 2pt minus 2pt}

% Single spaced headers
titleformat{chapter}      % command
    [display]               % shape
    {color{UOFURED}centeringnormalfontLargebfseriesdoublespacing}
    {MakeUppercase{chaptertitlename} Largethechapter}
    {0pt}                   % separations
    {MakeUppercase}        % before
    []              % After (leave blank)

%titleformat{chapter}[display]{centeringnormalfonthugebfseriessinglespacing}{chaptertitlename thechapter}{40pt}{huge}
titleformat{section}{centeringsinglespacingnormalfontLargebfseries}{thesection}{1em}{}
titleformat{subsection}{centeringsinglespacingnormalfontlargebfseries}{thesubsection}{1em}{}
titleformat{subsubsection}{centeringsinglespacingnormalfontnormalsizebfseries}{thesubsubsection}{1em}{}

Here is how I define a chapter so that the text is all caps

chapter{uppercase{Chapter title goes here}}

However, my University requires that long chapter titles need to be inverted pyramids. I’ve read you can do this by specifying line breaks like this:

chapter[This is a really long title that needs to be wrapped as an inverted pyramid]{This is a really long title that  needs to be wrapped as an  inverted pyramid}

I am getting an error message after compiling in ubuntu that says:

! TeX capacity exceeded, sorry [main memory size=5000000].
reserved@a #1#2->let #1#2reserved@a

l.8 ...ds to be wrapped as an  inverted pyramid}

!  ==> Fatal error occurred, no output PDF file produced!

would anyone know how to fix this?