When attempting to chunked-upload a file using the API, I get the following error:
Catchable fatal error: Argument 3 passed to AbuseFilterHooks::onUploadStashFile() must be of the type array, null given in /var/www/html/w/extensions/AbuseFilter/AbuseFilter.hooks.php on line 730
The easiest way to reproduce is to try uploading a file bigger than 5 MB using the UploadWizard.