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ISSUE SUMMARY:
After creating a group with file upload ability and then going to upload a file after it appears to be done uploading there's a button to click that says "Done" but clicking it doesn't do anything.
STEPS TO REPLICATE:
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RESULT
EXPECTED RESULT
BROWSER
Did you edit htaccess file before? if yes, please you revert back to the original file, technically the upload action should be call this URL index.php?option=com_community&view=files&task=multiUpload&type=discussion but when call it your server redirect it (error sess other 303) and redirect to this page index.php?option=com_content&view=article&id=15&Itemid=101
I dont know why this issue is happening, this is server or Joomla configuration issue, which only you know what you configured before.
You can try this on the fresh installation, it will work perfectly.