KMC keep saying "You must have flash installed. click here to download"

I just installed Kaltura 11.2.0 on CentOS 6.7.

The installation was working well, but the problem is when I access to KMC is keep display "You must have flash installed. click here to download", but I can access to Admin Console as normal.

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This CentOS was installed on my local testing VM. And I already installed the latest version of Adobe flash. Can anybody help me with this? Because I'm very new with this thing.

Thank you