An error has been encountered

Hi
Once you log into the admin panel gives me the following error:

Overall, the problem comes when I try to change from the admin account to a reseller, and I get this error.
I try to login with Reseller name and to add a new customer and gave me an error : An error occurred. Please contact your administrator.

Linux:ubuntu trusty
i-MSCP version:1.1.16

Hello,
What i did was that i back to the old version and i-mscp-1.1.14 and everything was in Okay.
Then upgraded to 1.1.16 and now everything worked as it should