From 902bdbabdc530629efd59144c87a19d619cfa41e Mon Sep 17 00:00:00 2001
From: Jakob Gerstmayer <jakob@JakobLaptop.fritz.box>
Date: Tue, 28 Jan 2020 17:39:21 +0100
Subject: [PATCH] fixed issue with version throwing an error if it is null

---
 src/ol/format/WMTSCapabilities.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ol/format/WMTSCapabilities.js b/src/ol/format/WMTSCapabilities.js
index f125e357a8..64dd2dac8d 100644
--- a/src/ol/format/WMTSCapabilities.js
+++ b/src/ol/format/WMTSCapabilities.js
@@ -74,7 +74,10 @@ class WMTSCapabilities extends XML {
    * @inheritDoc
    */
   readFromNode(node) {
-    const version = node.getAttribute('version').trim();
+    let version = node.getAttribute('version');
+    if(version) {
+      version = version.trim();
+    }
     let WMTSCapabilityObject = this.owsParser_.readFromNode(node);
     if (!WMTSCapabilityObject) {
       return null;