Contact the BASin author
By Github
Should you have any questions about BASinC, or find a bug (which, as BASinC is under constant development, is quite likely) then you should send an email to the author.
The address is:
Please do not contact the SPIN Team with your queries - although BASin is developed by them, they do not have any actual authoring input.
On the Discord
The author of BASin is a moderator of the Sinclair BASIC forum on the World of Spectrum website. You can leave queries about BASIC in general as well as BASin. The address is