check error before revisions

packages/app/src/components/PageHistory.jsx

@@ -39,18 +39,18 @@ function PageHistory(props) {
     })();
   }, [props.revisionComparerContainer]);
 
-  if (revisionsData == null) {
+  if (errorMessage != null) {
     return (
-      <div className="text-muted text-center">
-        <i className="fa fa-2x fa-spinner fa-pulse mt-3"></i>
+      <div className="my-5">
+        <div className="text-danger">{errorMessage}</div>
       </div>
     );
   }
 
-  if (errorMessage != null) {
+  if (revisionsData == null) {
     return (
-      <div className="my-5">
-        <div className="text-danger">{errorMessage}</div>
+      <div className="text-muted text-center">
+        <i className="fa fa-2x fa-spinner fa-pulse mt-3"></i>
       </div>
     );
   }