Kayako Fusion 4.5* - 4.6* is integrated with OBAS according to OBAS integration with Kayako Fusion.
But it does not function in Chrome:
CP > Help and Support > Trouble Tickets
shows a white page.
Such behavior is considered to be a software issue with ID PBAS-29054 and it is fixed since OBAS version 4.5
Upgrade OBAS to the latest version.