download watermark.html in chrome

[borjaevo]

Hi,

Probably is some misconfiguration with MIME types, but i don't know, i have multiple websites running on my apache and have no problems. When loading roundcube in chrome browser, it displays a prompt to download watermark.html two times. The same in ie11 seems to work fine.
I installed roundcube from virtualmin script.

how can i repait this?

Thanks