Hi Metin, yes I can reproduce that over here - it's not a regular crash but actually what's called an "assert" which is a kind of warning message that something isn't going as expected. Unlike a regular crash there is an "Ignore" button which you can push to just dismiss it and then you should be able to continue on normally.

I can probably fix it up to avoid it from happening in the v3 final release to just do nothing instead of assert. The "endpoints" mode is not meant to work on something like a circle, it's meant to work on a polyline.

Thanks for reporting it.

- Michael