updated api-call error-handling

src/components/EqValueGraph.vue

@@ -55,6 +55,8 @@ export default {
 
     const parseObject = async () => {
       data.rounds = await GetPlayerValue(store, store.state.matchDetails.match_id)
+      if (data.rounds === null)
+        data.rounds = {}
 
       for (const round in data.rounds) {
         for (const player in data.rounds[round]) {