progressbar.min.js.map not found

Hello,

wu have a problem with the plugins, it was ok for one year, and for a week or two, we have a problem , he does’nt find :
https://mydomain.com/wp-content/plugins/quiz-master-next/js/progressbar.min.js.map
We have change nothing.
We have try an update from the plugin, but it is the same.

The console of javascript say :

on firefox :

request failed with status 404
URL de la ressource : https://mydomain.com/wp-content/plugins/quiz-master-next/js/progressbar.min.js?ver=4.9.6
URL du lien source : progressbar.min.js.map[En savoir plus]

on safari :

https://mydomain.com/wp-content/plugins/quiz-master-next/js/progressbar.min.js.map not found

when we send the test, a wheel turn without end, and there is no progressbar.

How can i fix it ?

Thank you.