diff --git a/example.config.js b/example.config.js
index d512e46..7758462 100644
--- a/example.config.js
+++ b/example.config.js
@@ -3,7 +3,6 @@ module.exports = {
   display_title: 'example',
   SERVER_ROOT: 'http://localhost:4040',
   EVENTS_EXT: '/api/timemap_data/export_events/deeprows',
-  CATEGORIES_EXT: '/api/timemap_data/export_categories/rows',
   ASSOCIATIONS_EXT: '/api/timemap_data/export_associations/deeprows',
   SOURCES_EXT: '/api/timemap_data/export_sources/deepids',
   SITES_EXT: '',
@@ -18,7 +17,6 @@ module.exports = {
     },
     features: {
       COLOR_BY_ASSOCIATION: true,
-      USE_CATEGORIES: true,
       USE_ASSOCIATIONS: true,
       USE_SOURCES: true,
       USE_COVER: false,
diff --git a/package.json b/package.json
index 7a14702..a80445c 100644
--- a/package.json
+++ b/package.json
@@ -100,6 +100,7 @@
     "workbox-webpack-plugin": "5.1.4"
   },
   "devDependencies": {
+    "@babel/highlight": "^7.14.5",
     "ava": "1.0.0-beta.8",
     "mocha": "^5.2.0",
     "node-sass": "4.13.1",
diff --git a/src/common/data/copy.json b/src/common/data/copy.json
index 4567108..e1bb445 100644
--- a/src/common/data/copy.json
+++ b/src/common/data/copy.json
@@ -145,7 +145,7 @@
       "categories": "Categories",
       "categories_label": "Categories",
       "explore_by_category__title": "Explore events by category",
-      "explore_by_category__description": "‘Categories’ refer to the victims of a given incident.<br><br>If no categories are selected, all datapoints are displayed.",
+      "explore_by_category__description": "",
       "shapes": "Shapes",
       "shapes_label": "Shapes",
       "explore_by_shapes__title": "Explore events by shape breakdown",
diff --git a/src/components/Toolbar.js b/src/components/Toolbar.js
index ad9dc2a..e0b7611 100644
--- a/src/components/Toolbar.js
+++ b/src/components/Toolbar.js
@@ -184,6 +184,7 @@ class Toolbar extends React.Component {
     return (
       <div
         className={classes}
+        key={iconKey}
         onClick={() => {
           this.selectTab(_selected);
         }}
diff --git a/src/reducers/validate/validators.js b/src/reducers/validate/validators.js
index 8299575..597639d 100644
--- a/src/reducers/validate/validators.js
+++ b/src/reducers/validate/validators.js
@@ -87,12 +87,15 @@ export function validateDomain(domain, features) {
 
   function validateArray(items, domainKey, schema) {
     items.forEach((item) => {
+      if (domainKey === "events" && item.date === "" && item.time === "")
+        return;
       validateArrayItem(item, domainKey, schema);
     });
   }
 
   function validateObject(obj, domainKey, itemSchema) {
     Object.keys(obj).forEach((key) => {
+      if (key === "") return;
       const vl = obj[key];
       const result = Joi.validate(vl, itemSchema);
       if (result.error !== null) {