[Tex/LaTex] Missing \item problem with enumerate

#enumeratelists

I get an error when trying to build my PDF in Texmaker, I have following lines of code giving me an issue despite working this morning:

\begin{enumerate}[a)]
\item Some text
\item Some text
\item Some text \\
\end{enumerate}

I get the following message:

enter image description here

As there are many issues that are similar I've tried the answer on this question to see if my enumerate was bugging due to the \\ and it wasn't the case. The strange thing is when I type the following it works perfectly:

\begin{enumerate}
\item Some text
\item Some text
\item Some text \\
\end{enumerate}

Best Answer

I found a fix for this, I'd copied pasted all the \usepackage lines from another previous version of my document which didn't have \usepackage{enumerate}, once I added this package my document compiled perfectly as shown below:
enter image description here

I decided I'd leave the question open and post a solution anyways as it's easy to miss and took me quite a while to figure it out despite being an easy thing to fix.