FIX: more generioc error handling

frontend/src/main.js

@@ -236,8 +236,8 @@ async function init() {
           window.console.debug(e.response)
           commit('set_transaction_result', {
             type: 'error',
-            error: e.response.data.exception,
-            uuid: state.ta_list[APIUtil.getAPIErrorIndexFromDBException(e.response.data.exception)].uuid
+            error: 'exception' in e.response.data ? e.response.data.exception : e.response.data,
+            uuid: 'exception' in e.response.data ? state.ta_list[APIUtil.getAPIErrorIndexFromDBException(e.response.data.exception)].uuid : null
           })
         } finally {
           commit('setTransactionBusy', false)