When using the options -> Auto copy to clipboard option there is occasionally a "Error cannot open system clipboard" error pop up and crash. Happens when using any other program that also uses the system clipboard at the same time as sexscripts/groovyscripts.

Which OS and Java version, please ?

Windows 10 home and Java version 8 update 131

This is a strange error, looks specific to some Windows behaviour.
The next release of SexScripts will try to avoid crashing, but not much more can be done. Sorry for he inconvenience.

Alright well popping up the error but then continuing would be a significant improvement still. Crashing out the script is really what makes it frustrating.