Beamer - ! File ended while scanning use of next

I ran into an issue with the following code

begin{document}


    begin{frame}[fragile] % Start of frame

        begin{columns}[t]

            begin{column}{.02textwidth}end{column} % Empty spacer column

            begin{column}{.465textwidth} % The first column


                begin{block}

                    begin{minted}{c}
                        int main() {
                            return 0;
                        }
                    end{minted}

                end{block}
            end{column}

        end{columns}
    end{frame} % End of frame
end{document}

With the following error

Runaway argument?
! File ended while scanning use of next.
<inserted text> 
            par 

I’m putting my solution here because I wasted hours trying to figure out what went wrong with such a cryptic error message

begin{frame}[fragile]{Title}
 ...
end{frame}