Solution for Unknow Toolkit COM Server error.(801) of SD C4

One of my customer who own MB SD C4 and yesterday he got a problem , it shows error as following

But how to solve this issue ?

Here we share solution

Solution: Replace the bin file of C:\Program Files (x86)\Mercedes-Benz\SDconnect Toolkit,

Bin file download link: https://mega.nz/file/udxC0T4I#Cu5bFZ2CaOHiN6x-oVxrrhfnyS2eDXHUGmIl-YC_RO0
Then open “TkAdministration” to upgrade the firmware

And then the machine will be in good work