I recently downloaded the DasrardlyBanna FPS constructor off the asset store and I immediately get a script error. It says that in the script gunscript that at line 22 the namespace already contains a definition for gun types. PLEASE HELP!
Did you load it into an empty project? Have you changed anything? What platform do you currently have selected in your build settings?
My only suggestion is to make a new, empty project and import the package afresh. If that doesn’t work, I’d start with the “Package Support Forums” linked from its Asset Store page, as people there are more likely to know how to help.