Compose Email ERROR!

Hi Everybody!

I have the SuiteCRM 7.9.4 and i upgrade the version from 7.9.1 to 7.9.4 and when i go to Contact’s module and i hit the ‘Create task’ button then i made click on Compose email and it show a popup window, and i filled the fields…

but when i hit the send button not works, and show me a window like bottom:

i hope someone can give me a hand with this…