add check if defined

73_GardenaSmartBridge.pm

@@ -59,7 +59,7 @@ use strict;
 use warnings;
 use FHEM::Meta;
 
-my $version = "1.6.1";
+my $version = "1.6.2";
 
 
 sub GardenaSmartBridge_Initialize($) {
@@ -497,7 +497,8 @@ sub ErrorHandling($$$) {
         return;
     }
 
-    if (
+    if ( defined($param)
+        and $param
         (
             ( $data =~ /Error/ )
             or defined( eval { decode_json($data) }->{errors} )