get white page after update to Joomla 3.4.1

Hello,

I have php 5.5 MySQL 5.6 Chronoforms 4.0.5 and Chronoconnectivity 4.0.1
I just update Joomla from 3.3.6 to 3.4.1. When I login to administrator area to go to Chronoforms and Chronoconnectivity, I got a white blank page.

Please advise.

Thank you,
Nilubon

Thank you Bob.
It worked.
Nilubon