--- a/src/server/webdav/webdav.c	Sat Mar 18 11:44:37 2023 +0100
+++ b/src/server/webdav/webdav.c	Sat Mar 18 12:06:18 2023 +0100
@@ -892,6 +892,14 @@
 {
     DefaultWebdavData *data = request->userdata;
     
+    if(!s) {
+        // stat is required for the default vfs
+        // if s is null, the dav backend config is not right
+        // (multiple backends configured and the primary backend doesn't
+        //  use the VFS)
+        return 1;
+    }
+    
     // add all requested vfs properties like getcontentlength ...
     if(webdav_add_vfs_properties(
             resource,