The most recent Adobe Flash version 27.0.0.170 will break the vSphere Web Client (Flash) interface. VMware administrators will see a “Shockwave Flash has Crashed” error when trying to access vSphere via the Flash client. Only perform the beta update for Flash if absolutely needed. If you use vCenter version 6.0 and earlier you can also use the VMware vSphere client as a workaround. Anybody that uses 6.5 and 6.5 u1 will have to use the Web Client for access.
Adobe does have a Beta update that we applied locally and it did resolve our problem.
