hello i am seriously becuse i have big problem with lr timelapse 4.7.8 pro becuse i install it and i install aobe dng cnv and the lrtimelapse don t detect the dng so i can t use visual previews plzzz help me

First thing would be to install the latest (!) version of the Adobe DNG Converter and latest (!) version of LRTimelapse.
Link to the DNG Converter on https://lrtimelapse.com/install/

If the problem persists, check the path setting to the the DNG converter, under "external tools" in the LRTimelapse settings. It should point to the executable file of your DNG converter installation.
Usually this is
C:\Program Files\Adobe\Adobe DNG Converter\Adobe DNG Converter.exe
But if you installed the Adobe DNG Converter somewhere else, you might have to change this.

theank you very much gwegner it work now thank you