Not able to upload a document via plugin's environment in Wordpress site

Hi, respectable colaborators in this community

In my WP site i can upload files via midia upload and also directly into pages or posts.

It is fine also to update the themes through each theme’s button. But if i click in Wordfence’s button to update the themes all at once i get the error message below.

When clicking in the button inside a plugin, like ‘send a document’, or while reviewing the plugins page list, when i click on the button that redirects to the author’s page of a chosen plugin, i get the following error message:

:( connection with arun.com.br was refused

I went through some answers here but i didn’t find a solution yet. For long time i have been avoiding this issue because i could always go around it. But this time the document must be uploaded via plugin, so that it works properly.

So, please, i need your help.

Thanks a lot!!