这是我面临的错误，我正在做一个迷你项目，用这个 youtube 链接可以更好地解释 - https://www.youtube.com/watch?v=Zzs2CzovhEI&list=PLUVqY59GNZQP8SlrFewicML2dSAUxBfAS
我在第四讲中发现了错误
无法读取未定义的属性"toString" 类型错误： 无法读取未定义的属性"toString" at LocalStorage.setItem (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modulesode-localstorage\LocalStorage.js：176：27) at C：\Users\RadheKrishna\Desktop\RPROJECT\Rproject\routes\index.js：49：31 at Layer.handle [as handle_request] (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\layer.js：95：5) at next (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\route.js：137：13) at Route.dispatch (C：\Users\RadheKrishna\Desktop\RPROJECT\Rproject\Rprojectode_modules\express\lib\router\route.js：112：3) at Layer.handle [as handle_request] (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\layer.js：95：5) at C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：281：22 at Function.process_params (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：335：12) at next (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：275：10) at Function.handle (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：174：3) at router (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：47：12) at Layer.handle [as handle_request] (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\layer.js：95：5) at trim_prefix (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：317：13) at C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules express\lib\router\index.js：284：7 at Function.process_params (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules\express\lib\router\index.js：335：12) at next (C：\Users\RadheKrishna\Desktop\RPROJECT\Rprojectode_modules express\lib\router\index.js：275：10)
这意味着.
toString()
方法不起作用。你能不能更详细一点，也粘贴代码。