UI container stopped working when reviewing report, after PU3 installation of 2018.

Hi,

I installed PU3 for 2018 and after that, UI container stopped working message appeared on each of print function.

It crashed when it went to preview screen.

Does anyone has any idea?

OS: Windows 2008 R2 SP1 - Terminal Services 

SQL: SQL2012 (11.0.6251)

Sage: Sage 300 2018 

PU2 environment worked fine. It started happening after PU3 installation. 

Currently I put it back to PU2.

Thank you for your help!