bugfix in ##172, forgot to load types second time

src/components/pricelist/PriceList.vue

@@ -463,9 +463,10 @@ export default {
     },
     computeType() {
       return id => {
-        return this.types.find(a => {
-          return a.id === id
-        }).name
+        const type = this.types.find(a => {
+           return a.id === id
+        })
+        return type ? type.name : null
       }
     }
   },