We are aware of the Chromium Embedded Framework causing game crashes and affecting some players ability to launch the game. The necessary team have been engaged and investigation is underway. We'll update once this has concluded. Thank you for your patience.
Because this is a known issue, it is not necessary to continue submitting Support tickets at this time.
For more information, please check the Forums here: https://en-forum.guildwars2.com/topic/128885-chromium-embedded-framework-host-for-guild-wars-2-stopped-to-work-merged/page/7/#comment-1884545