Show the backend error in the table if there is one

backend/static/css/styles.css

@@ -27,9 +27,8 @@ flex-direction: column;
   justify-content: center;
 }
 
-.watch-table {
-font-size: 90%;
-
+.pure-table.watch-table td {
+  font-size: 90%;
 }
 
 .watch-table .error {
@@ -89,3 +88,10 @@ a[target="_blank"]::after {
   content: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAQElEQVR42qXKwQkAIAxDUUdxtO6/RBQkQZvSi8I/pL4BoGw/XPkh4XigPmsUgh0626AjRsgxHTkUThsG2T/sIlzdTsp52kSS1wAAAABJRU5ErkJggg==);
   margin: 0 3px 0 5px;
 }
+
+.fetch-error {
+padding-top: 1em;
+font-size: 60%;
+    max-width: 400px;
+    display: block;
+    }