How to fix file upload not working in chrome

How to fix file upload not working in chrome : Mac OS: can no longer upload any files in Chrome For some reason, I have disabled extensions as suggested. This does not work. I can’t upload files to google drive, can’t post a photo to Facebook, basically can’t upload files anywhere when using Chrome. Safari works fine. every few weeks,  Chrome stops allowing me to attach files by means of the “attachment/upload” buttons (i.e., in gmail, uploading photos on websites, etc.).

When I want to upload a photo or attach something, I can click the paperclip or “add file” buttons, but it just doesn’t do anything; no error messages or anything – literally nothing happens. I tried looking this issue up in the community here, but nobody seems to have the exact same issue. I already tried resetting my browser to the default settings and it didn’t fix the problem. Incognito windows also give me the same issue.
 
This randomly happens on and off, and I’m not sure why; I never touch my settings, so I don’t understand why it would change. After 3 or 4 weeks, it just seems to resolve on its own. It has started to become incredibly inconvenient as many sites do not allow you to just drop a file in rather than attach by means of an actual button (which is how I’ve been trying to get around this issue).
 
If anyone can help, it would be INCREDIBLY appreciated!!
 
UPDATE: Now Chrome is not allowing me to download anything from the PDF preview witht he button as well.

The issue occurs due to the Local Group Policy settings, which prevent users from uploading content to Portal for ArcGIS using Google Chrome. The Attachment Manager under the Windows component is responsible for this behavior.

 

Solution or Workaround

 

To resolve the issue, complete the following steps:

  1. Press the Windows key + R. In the Run window, type gpedit.msc, in the Open section. Press Enter or click OK.
The Run window. Click OK.
  1. In the Local Group Policy Editor window, on the left pane, navigate to User Configuration > Administrative Templates > Windows Components > Attachment Manager. On the right pane, double-click Do not preserve zone information in file attachments.
The Local Group Policy Editor window displaying the content in the Attachement Manager folder.
  1. In the Do not preserve zone information in file attachments window, select Enabled. Click Apply and OK.
The Do not preserve zone information in file attachements window displaying the Enabled option.
  1. In the Local Group Policy Editor window, double-click Inclusion list for low file types.
The Local Group Policy Editor window displaying the content in the Attachement Manager folder.
  1. In the Inclusion list for low file types window, select Enabled and paste the following line in the Specify low risk extensions input field:
.avi;.bat;.cmd;.exe;.htm;.html;.lnk;.mpg;.mpeg;.mov;.mp3;.mp4;.mkv;.msi;.m3u;.rar;.reg;.txt;.vbs;.wav;.zip;.7z
  1. In the Inclusion list for low file types window, click Apply and OK to save the changes.
The Inclusion list for low file types window displaying the Enabled option.
  1. Close the Local Group Policy Editor window and restart the computer.

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