When I try to use \printunsrtglossary with using the built-in symbols glossary, and try to apply style=long I get an Undefined control sequence error on the \printunsrtglossary line. Interestingly enough, the document seems to compile with the symbols glossary correctly printed in long style. Why is this resulting in an error and how I resolve it? Thank you for your time!
\documentclass{article} \usepackage[symbols]{glossaries-extra} \glsxtrnewsymbol[description={position}]{x}{\ensuremath{x}} \glsxtrnewsymbol[description={velocity}]{v}{\ensuremath{v}} \glsxtrnewsymbol[description={acceleration}]{a}{\ensuremath{a}} \glsxtrnewsymbol[description={time}]{t}{\ensuremath{t}} \glsxtrnewsymbol[description={force}]{F}{\ensuremath{F}} \begin{document} \printunsrtglossary[title={Notation},type=symbols,style=long] \end{document} 
glossaries-extra(andglossaries) do you have? Your MWE works fine withglossaries-extrav1.25 andglossariesv4.35.glossaries-extrav1.18 (I unfortunately didn't glance at theglossariesversion before updating). Upgrading to the latest (v1.26) fixes the problem. If you post this as an answer, I'll accept it for anyone else who might have this trouble. Thanks!