Merge branch...

Merge branch '462115-vue-warn-invalid-prop-type-check-failed-for-prop-errormessage-expected-string-got-null' into 'master' 

Invalid prop: type check failed for prop "errorMessage"

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/153272



Merged-by: Alper Akgun <aakgun@gitlab.com>
Approved-by: Alper Akgun <aakgun@gitlab.com>
Co-authored-by: Eduardo Bonet <ebonet@gitlab.com>

app/assets/javascripts/ml/model_registry/apps/index_ml_models.vue

@@ -70,7 +70,7 @@ export default {
   data() {
     return {
       models: [],
-      errorMessage: undefined,
+      errorMessage: '',
       skipQueries: true,
       queryVariables: {},
     };
@@ -99,7 +99,7 @@ export default {
         sort: variables.sort?.toUpperCase() || 'DESC',
       };
 
-      this.errorMessage = null;
+      this.errorMessage = '';
       this.skipQueries = false;
 
       this.$apollo.queries.models.fetchMore({});