Hi ktnurse82,
Welcome to the Apple Community.
Wondering which Mac OS version you are trying to update from.
If it is MacOS 13 High Sierra, the difficulty is likely to be a compatibility issue.
Am no expert in this area, yet your request surely deserves a reply.
Mac OS versions before Catalina (Mac OS 10.15) used 32 bit apps,
whereas
Mac OS Catalina and later versions must use use 64 bit apps
32-bit app compatibility with macOS... - Apple Support
32-bit app compatibility with macOS High Sierra 10.13.4 and later - Apple Support
Locate all 32-bit apps in System Info
http://osxdaily.com/2018/03/06/find-32-bit-apps-mac/
Check Your Apps and Prepare for a 64-bit World
https://www.stclairsoft.com/Go64/index.html
(NB: Making a back-up of your important data is a wise first step before updating / upgrading.)
How to upgrade to macOS Monterey - Apple Support
All the best :-)