Uploads being blocked

I use iThemes security and a plugin called Pitchprint, that allows the users to upload pdf files when ordering a product using woocommerce.

Ithemes Security is blocking the js from uploading. The plugin uploads to the plugin folder.

When iThemes is disabled the upload works.

This is the console output when trying to upload:

jquery.min.js?ver=3.7.1:2

   POST https://www.exam.com/wp-content/plugins/pitchprint/uploader/ 403 (Forbidden)

send @ jquery.min.js?ver=3.7.1:2
ajax @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e. @ jquery-migrate.min.js?ver=3.4.1:2
d @ uploader.js:1
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
c @ jquery.min.js?ver=3.7.1:2
add @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
each @ jquery.min.js?ver=3.7.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
(anonymous) @ jquery-migrate.min.js?ver=3.4.1:2
e. @ jquery-migrate.min.js?ver=3.4.1:2
t @ jquery-migrate.min.js?ver=3.4.1:2
e. @ jquery-migrate.min.js?ver=3.4.1:2
_onSend @ uploader.js:1
e.isFunction.l. @ uploader.js:1
i.submit @ uploader.js:1
_plsUpload @ file-uploader.js:1Understand this error
file-uploader.js:1 Sorry, there was an error uploading your files. Please check the network connection and try again

Is there a setting that can be modified to allow the upload with JS?

Thanks