JS conflict with NinjaForms file upload

Hello, after installing your plugin I get an error when trying to upload files via NinjaForms. The error is as follows:

Uncaught TypeError: data_post.split is not a function
at HTMLDocument. (woocommerce-boost-sales.js?ver=1.4.0:340)
at HTMLDocument.dispatch (jquery.js?ver=1.12.4-wp:3)
at HTMLDocument.r.handle (jquery.js?ver=1.12.4-wp:3)
at Object.trigger (jquery.js?ver=1.12.4-wp:3)
at Object.a.event.trigger (jquery-migrate.min.js?ver=1.4.1:2)
at Function.ajax (jquery.js?ver=1.12.4-wp:4)
at send (jquery.fileupload.js?ver=3.0.27:925)
at a…_onSend (jquery.fileupload.js?ver=3.0.27:988)
at a…_onSend (widget.min.js?ver=1.11.4:11)
at Object.data.submit (jquery.fileupload.js?ver=3.0.27:688)

Please advise, thanks!