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I can no longer synchronize my site with Netlify. The error message is: “An error occurred while connecting to the server. Please check your server settings or try again”. But the Test connection is ok.
I’ve been having this occur tonight as well, primarily when I try to add a large media file. When I remove that file, it works. If I do a simple page update, it works. Was going to post on support as well.
This issue seems to be caused by improper handling of files which are empty. We will investigate this issue this week. Temporary you can use manual deployment method as a fallback (netlify allows upload of the ZIP file as a deploy).