Fix handling of errors in cypress tests

client/cypress/support/commands.ts

@@ -161,15 +161,13 @@ Cypress.Commands.add('mockGraphql', (options?: any) => {
         rootValue.constructor === GraphQLError ||
         rootValue.constructor.name === "GraphQLError"
       ) {
-        return Promise.resolve()
+        return req.reply(
-          .then(
+          {
-            () =>
+            body: {
-              new Response(
-                JSON.stringify({
               data: {},
               errors: [rootValue]
-                })
+            }
-              )
+          }
         );
       }