@genericname1 said in Callback is empty. Did you forget to use '!' after function?:
applying touch mode triggers the issue
Which version of BAS are you using? In version 29.4.1, the problem does not recur.
@korthresh Download Canvas Inspector, do actions on target website thru inspector, it will catch any canvas fingerprint atempts from this site. After you got canvas examples - compile them to Perfect Canvas request code and use it when you get fingerprints. It may be really slow, then you need to read about custom servers and use them to collect your own fingerprints with pre-compiled perfect canvas data.