update not possible

[Vompire96]

I just unlocked the developer mode with obdeleven, I downloaded and put the mib2 toolbox file in the memory card and trying to install it the start button does not work, so I tried again to change the CPU folder and c It's the same thing, I can't understand my mistake.

for information I have the version : MST2_EU_SE _ZR_P0253T et GEM 3.5

3 days fighting with him to make it work 🥲. please help me