diff --git a/app/controllers/ApiController.scala b/app/controllers/ApiController.scala
index e457e56b..af2d285b 100644
--- a/app/controllers/ApiController.scala
+++ b/app/controllers/ApiController.scala
@@ -85,7 +85,7 @@ class ApiController @Inject()(authActionFactory: AuthActionFactory,
               ApiResult(API_RESULT_FAIL, s"Deleting Solr Index failed: ${e.getMessage}", None)
             )
           )
-        case _ => BadRequest(
+        case _: Throwable => BadRequest(
           Json.toJson(
             ApiResult(API_RESULT_FAIL, s"Deleting Solr Index failed due to an unknown error", None)
           )
diff --git a/build.sbt b/build.sbt
index 760a2e69..a44d384d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,7 @@
 import com.typesafe.sbt.GitBranchPrompt
 
 name := "search-management-ui"
-version := "3.13.8"
+version := "3.13.9"
 
 scalaVersion := "2.12.11"
 
diff --git a/frontend/src/app/components/admin/admin.component.html b/frontend/src/app/components/admin/admin.component.html
index f7c4e198..17109a58 100644
--- a/frontend/src/app/components/admin/admin.component.html
+++ b/frontend/src/app/components/admin/admin.component.html
@@ -10,7 +10,6 @@
   (solrIndicesChange)="solrIndicesChange($event)"
   (showSuccessMsg)="showSuccessMsg($event)"
   (showErrorMsg)="showErrorMsg($event)"
-  [solrIndices]="solrIndices"
 >
 </app-smui-admin-rules-collection-list>