Hello!
It might be a thumbnail bug of Bandicut.
1. Please try Bandicut 1.3.1 from
https://www.bandicam.com/bandicut-video ... dl.php?old
(We will release the fixed version in a week.)
2. If you still have the problem with Bandicut 1.3.1, please attach the screenshot of the error message.
We're sorry for your inconvenience.