Since this commit in meta-agl-devel, web applications started crashing on startup:

{{commit 61aee64f7b4fc1c78dd8a585a79ec9e4e7aa820a
Author: Stephane Desneux <stephane.desneux@iot.bzh>
Date: Tue Feb 5 18:53:45 2019 +0100

libwindowmanager: bump revision

Included changes:

• 42dbcc0 Improve integration of callsync
• bab3af6 Add gitreview file for guppy branch

Bug-AGL: SPEC-2130

Change-Id: Ib6f93a728dafe2dbaca6324ade3e69f9cd33b339
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>}}

Tested on Minnowboard.