As I told about, after upgrading from 4.2 (I am testing from 4.3) many errors occurs. This theated in a glabal way in id4377.
After connecting as administrator if you submit "Users management" and try to modify a user preférences you will reach a
fatal error :
Table "<your database>.tiki_trk_1" missing
You will find joined the htm saved from "page source code"