diff -up ../lib/DAV/Server.php.php74 ../lib/DAV/Server.php
--- ../lib/DAV/Server.php.php74	2019-10-11 09:25:27.807508723 +0200
+++ ../lib/DAV/Server.php	2019-10-11 09:25:30.679493668 +0200
@@ -564,7 +564,7 @@ class Server extends EventEmitter implem
      */
     function calculateUri($uri) {
 
-        if ($uri[0] != '/' && strpos($uri, '://')) {
+        if ('' != $uri && '/' != $uri[0] && strpos($uri, '://')) {
 
             $uri = parse_url($uri, PHP_URL_PATH);
 
diff -up ../lib/DAV/Xml/Property/Href.php.php74 ../lib/DAV/Xml/Property/Href.php
--- ../lib/DAV/Xml/Property/Href.php.php74	2019-10-11 09:23:28.870132179 +0200
+++ ../lib/DAV/Xml/Property/Href.php	2019-10-11 09:23:45.854043154 +0200
@@ -58,7 +58,7 @@ class Href implements Element, HtmlOutpu
      */
     function getHref() {
 
-        return $this->hrefs[0];
+        return (isset($this->hrefs[0]) ? $this->hrefs[0] : null);
 
     }