A couple of days ago I kept logging to vSphere Web Client unsuccessfully. My favourite browser was (is) Chrome. Actually, logon was successful, but the real issue was the message “Shockwave Flash has crashed”. Changing browser, rebooting, changing PC… nothing helped.
Chatting with colleagues, and receiving unusual mails from customers, made me understand that it wasn’t just my case, but something wider.
Joining several specialized (and not) forums, the seed of this issue seemed to be a newer version of Flash (18.104.22.168) with latest Chrome (61.0.3163.100) update, a version unpublished directly by Adobe.
The immediate workaround came from a William Lam post: he found that if you still had the previous or even older version of Flash, you could simply delete the latest version and Chrome would function again.
Final solution of the issue is shown in his post, updated day after day with news