my springer manuscript works fine on overleaf, but when building pdf for review submission I get errors. I don't know how to fix this. Could you please help me?
''''
\RequirePackage{fix-cm}
\RequirePackage{amsmath}
\documentclass[smallextended]{svjour3} % onecolumn (second format)
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{amsmath} ``
\usepackage{doi}
\usepackage{url}
\usepackage[caption=false]{subfig}
'''' My log file https://1drv.ms/b/s!Ajv_KLtup0whaZa_nx-6MCIkpo0
There is a forbidden character on page 7 in the sentence
.... volves a subset of variables and specifies the allowable ...
The fi in "specifies" is a ligature which is not allowed in pdflatex. Delete it and retype it as fi