The solution offered by www.obdii.shop engineer:
Please follow the step-by-step guide to solve.
Step 1: Go to Program Files (x86)-> Mercedes-Benz-> AddOn Center
Change the file name “AddOnCenter.exe” to “AddOnCenter.ex_”
Step 2: Open [Windows Task Manager]
Select [Java.exe.32] and [Javaw.exe*32] and click on “End Process”
Step 3: Delete all the files in “Program Files (X86)/Mercedes-Benz/Xentry” option
Step 4: Run [XENTRY FIX2] to fix the error