Go to Admin page --> Plugin tab -->WYSIWYG Editor options --> ticked checkbox "Allow images to be uploaded" --> here, it'll be show option "Allow other content to be uploaded, e.g. Flash, PDF" and checked it! :)
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.
April 20, 2021: Q2A 1.8.6 released!