![hyperref - Token not allowed in PDF string, caused by a macro with an optional arg? - TeX - LaTeX Stack Exchange hyperref - Token not allowed in PDF string, caused by a macro with an optional arg? - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/PY6lG.png)
hyperref - Token not allowed in PDF string, caused by a macro with an optional arg? - TeX - LaTeX Stack Exchange
![Package hyperref Warning: Token not allowed in a PDF string (Unicode): removing `\faLink' on input line 1 - TeX - LaTeX Stack Exchange Package hyperref Warning: Token not allowed in a PDF string (Unicode): removing `\faLink' on input line 1 - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/00Ixx.png)
Package hyperref Warning: Token not allowed in a PDF string (Unicode): removing `\faLink' on input line 1 - TeX - LaTeX Stack Exchange
babel: "Token not allowed in a PDF string" warning with layout=counters · Issue #138 · latex3/latex2e · GitHub
![How to avoid warning messages from hyperref package in LaTex | Computational Environmental Physics Lab (CEPL) How to avoid warning messages from hyperref package in LaTex | Computational Environmental Physics Lab (CEPL)](https://albertsk.files.wordpress.com/2021/01/enphysoft-icon.png?w=100)
How to avoid warning messages from hyperref package in LaTex | Computational Environmental Physics Lab (CEPL)
![pdftex - Package hyperref Warning: Token not allowed in a PDF. (using \frac{}{} in Section title} - TeX - LaTeX Stack Exchange pdftex - Package hyperref Warning: Token not allowed in a PDF. (using \frac{}{} in Section title} - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/hfgGH.png)
pdftex - Package hyperref Warning: Token not allowed in a PDF. (using \frac{}{} in Section title} - TeX - LaTeX Stack Exchange
babel: "Token not allowed in a PDF string" warning with layout=counters · Issue #138 · latex3/latex2e · GitHub
![Ways to avoid 'Package hyperref Warning: Token not allowed in a PDF string' warning - TeX - LaTeX Stack Exchange Ways to avoid 'Package hyperref Warning: Token not allowed in a PDF string' warning - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/cXjDy.jpg)