fix

src/component/modules/generalMiniCanvas.vue

@@ -577,6 +577,7 @@ export default defineComponent({
 					})
 					exportCanvas.backgroundImage = back
 					await new Promise((resolve, reject) => {
+						if(allObjects.length == 0)resolve('')
 						allObjects.forEach((item,index)=>{
 							// let obj = fabric.util.object.clone(item);
 							if(item.type == 'circle')return
@@ -612,7 +613,6 @@ export default defineComponent({
 							
 						})
 					})
-					
 					let position = JSON.parse(JSON.stringify(canvas.viewportTransform))
 					position[4] *= scale
 					position[5] *= scale