Task environment is not working

Question

I am using a task environment but it is not working. My sample code is

\begin{tasks}[label=(\arabic*)]
\task 1
\task 2
\task 1
\task 3
\task 4
\end{tasks}

But if I use the same code without [label=(\arabic*)] then it is working. Please do help.

Answer 1

As Bernard said in his comment, the syntax for labels has changed since version 1.0 of package tasks.

If you have a version older than 1.0 but at least 0.9 or newer, for example, if you're using Overleaf, which has

tasks.sty    2016/08/13 v0.12 Horizontalcolumnedlists (CN),

you should use counter-format={<counter specs>}.

This option is now deprecated, it set a custom label in a peculiar way. The letters tsk are replaced with the task-counter. An optional argument directly following these letters specifies the counter format: 1: \arabic, a: \alph, A: \Alph, r: \roman and R: \Roman.

You can find the old documentation of the package in its repository on GitHub.

This works on Overleaf, I hope it works also for you:

\documentclass{article}
\usepackage{tasks}
\begin{document}
\begin{tasks}[counter-format=(tsk[1]), label-width=4em]
\task 1
\task 2
\task 1
\task 3
\task 4
\end{tasks}
\end{document}