The current version of Chrome can be viewed in the browser menu in the section "Reference → About the Google Chrome browser».
The latest versions of Chrome are gradually introducing mechanisms to protect against unsafe file downloads. Depending on the version of Chrome you are using, when you try to download a file over an insecure HTTP protocol, the browser will either display a warning or block the download completely. This solution is due to the fact that when downloading without encryption, attackers in the process MITMattacks the contents of the file can be replaced.
To prevent file uploads from being blocked, you need to switch the site to work via HTTPS: