Ok. You used the OTP block reset unnecessarily. It should only be used if blocks from 0 to 5 are changed. Every time you use it, a lot of operations are burned in your mykey.Yesterday evening with Mikai I executed options 5 and 6
[5] -> Reset mykey data (virgin)
[6] -> Reset SRIX OTP blocks
Then I put the key back in the machine and it made a little noise.
I had 0 € on the key and after I add credit with mikai option 3
[3] -> Add credit to n.cent
Now it works perfectly i can add money with real coins or with Mikai
Thank you very much for studying my case @Mondial light