diff --git a/lib/Controller/OtherController.php b/lib/Controller/OtherController.php
index 94f7ce56..6eabe9bf 100644
--- a/lib/Controller/OtherController.php
+++ b/lib/Controller/OtherController.php
@@ -264,20 +264,18 @@ class OtherController extends GenericApiController
         bool $testIfFile = true,
         bool $testIfExecutable = true
     ): string {
-        if ($path instanceof \Closure) {
-            try {
-                $path = $path();
-            } catch (\Exception $e) {
-                return 'test_fail:'.$e->getMessage();
+        if ($testIfFile) {
+            if ($path instanceof \Closure) {
+                try {
+                    $path = $path();
+                } catch (\Exception $e) {
+                    return 'test_fail:'.$e->getMessage();
+                }
             }
-        }
 
-        if (!\is_string($path)) {
-            return 'not_found';
-        }
-
-        if ($testIfFile && !is_file($path)) {
-            return 'not_found';
+            if (!\is_string($path) || !is_file($path)) {
+                return 'not_found';
+            }
         }
 
         if ($testIfExecutable && !is_executable($path)) {
diff --git a/lib/Service/BinExt.php b/lib/Service/BinExt.php
index 7c0e836d..18aebd1a 100644
--- a/lib/Service/BinExt.php
+++ b/lib/Service/BinExt.php
@@ -33,7 +33,7 @@ class BinExt
 
         if ($copy) {
             if (empty($path)) {
-                throw new \Exception('binary path is empty (run occ maintenance:repair)');
+                throw new \Exception('binary path is empty (run occ maintenance:repair or use system perl)');
             }
 
             if (!copy($path, $target)) {