For clarity: There’s a bug in the bootloader that was shipped in the first batch. For those boards it’s important to update the bootloader that can be found in the first post. If that fails the backup bootloader can be used, let me know if you have problems. I’ll also open a troubleshooting topic later.
Here’s a new bugfix release that fixes the midi aftertouch which broke in the last release. Aftertouch is now a bit more sensitive too. Here it is: striso_control_2021-03-14_v2.0.3-1-g9328d67.uf2