It seems that there is a problem with the bootloader for your minimOSD (as the error message suggests ) 
A simple solution would be to simply burn the arduino bootlader back onto your MinimOSD board. I recently wrote a quick guide on how to burn the arduno bootloader onto one of our brushless gimbal controllers, so you can follow the bootloader guide here
The only difference will be that you will need to connect the USBasp to the ISP pins as shown below.
Once arduino is open
Select Tools > Board and select your board (for minimOSD select Arduino Pro or Pro Mini (5v, 16MHz) w/ATmega128)
Select Tools > Programmer > USBasp
Select Tools > Burn Bootloader
