unable to load (in user window)

Hi,

the problem did not occure in the PREVIOUS version of the plugin (before updating to 1.8)

everything works (payment etc) but when i am in the USER (ADMIN) pannel, INSIDE an USER (so i need to open any one user), i have a message (left) : unable to load payplug.js

don’t know why he tries to load there… but he tries… and is unable to succeed it seems… could u check and advise please ?

***Failed to load plugin url: https://synexta.fr/wp-content/plugins/payplug-payments/assets/js/button.js***