Custom Visual After pbiviz package Giving Error

1)I 'm creating pbiviz package then importing it to app.powerbi.com in first time it's not giving any error but second or third trying to generate package it's giving these errors - ( I am using the same name in visualClassName which in pbiviz.json and in my class which one in visual.ts but issue is still continue ) :

error TYPESCRIPT /src/visual.ts : (32,23) Cannot find name 'VisualSettings'.
error TYPESCRIPT /src/visual.ts : (60,55) Cannot find name 'VisualSettings'.
error TYPESCRIPT /src/visual.ts : (61,14) Cannot find name 'VisualSettings'.
error TYPESCRIPT /src/visual.ts : (61,48) Cannot find name 'VisualSettings'.
error TYPESCRIPT /src/visual.ts : (72,14) Cannot find name 'VisualSettings'.
error TYPESCRIPT /src/visual.ts : (73,26) Cannot find name 'VisualSettings'.
error TYPESCRIPT /visualPlugin.ts : (8,156) Property 'PowerKpi' does not exist on type 'typeof denemePowerBIE1D441

2)In setting.ts dataPointSettings class is giving error Class Name must be in a pascal case - Should i change this default class name to Pascal Case?