I am trying to incorporate this form to import csv or excel files into my system. I was guiding myself from other web pages. Import the css and js files. But it's not working. I get this error in the console:
[Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check link .
Someone could tell me which library is or where the documentation is to be able to configure it.
Please, I would greatly appreciate your help. This is the link: link and in this domain if it works normal: link