WoW-Mania

I get this windows error message when I try to start launcher. Nothing changed from when I logged in earlier.

Contents of problem are
Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: Launcher.exe
Problem Signature 02: 1.2.7389.29123
Problem Signature 03: 5e7b82a6
Problem Signature 04: System
Problem Signature 05: 4.8.4001.0
Problem Signature 06: 5d37b3ae
Problem Signature 07: 82f
Problem Signature 08: 15a
Problem Signature 09: System.Windows.Markup.XamlParse
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 7177
Additional Information 1: 6e03
Additional Information 2: 6e03ac11853bb95f966541d076bdbc52
Additional Information 3: c5a1
Additional Information 4: c5a1a7d5b299988007d75595fe516378


I was playing fine up until 30 mins ago when disconnected and could not reconnect due to above.