Cant burn a bootloader

[avandalen]

Hi,
I can't burn the bootloader (this was the actual problem), I can't figure out..
I opened a new issue here:
SpenceKonde/megaTinyCore#1077
Do you have any idea?

This is my article that I wrote about it in 2020 (that time it works well):
https://avdweb.nl/arduino/attiny3217/bootloader-attiny3217

[wagiminator]

I don't know, maybe it's a problem with the timing.