GUI not working on Big Sur with Opencore 0.6.5

Si I followed exactly what is said on Dortania's guide for a better GUI, but it does not work.

Well the only thing I didn't follow was PickerAttributes : 1 and not 17 as suggested (but it does not work even if I put 17).

What should I do ?

Here are my boot-args, I don't know if it has an effect on my problem

keepsyms=1 alcid=1 npci=0x2000

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Ryzen 5 2600 + GT 720. Everything else works fine.