Added troubleshooting section to readme

Change-Id: I146cbcd6b7c46f2fb81f9431841a0aa6efd430d8
diff --git a/Changes b/Changes
index 5b5a855..f5fc334 100755
--- a/Changes
+++ b/Changes
@@ -1,4 +1,4 @@
-0.40 2020-12-03
+0.40 2020-12-07
         - Modernize ES and fix in-loops.
         - add roll() method to state object.
         - Fix wrong hint-mirror behaviour in Firefox.
@@ -15,6 +15,7 @@
         - Fix requirement of KorAP.vc in docgroupref
           (which broke the vc demo).
         - Improve RegEx-Button in vc builder.
+        - Added 'Troubleshooting' section to Readme.
 
 0.39 2020-10-07
         - Add information on secret file to Readme.