Protect Attachments - PDFs in messages are not possible

[rich20]

See the result

[xillibit]

On firefox i haven't the issue :

[rich20]

Sorry that I've not added the browser info. You are right, with Firefox occur not this problem. But with Chromium and Opera. Windows browser I can't test with my Linux OS. But it seems this error is Browser related.

[xillibit]

No issue neither with Edge :

[rich20]

Maybe someone can test it also with Google Chrome, so I let open this issue for now.

[github-actions]

This issue is stale because it has been open 30 days with no activity.

[xillibit]

In Google Chrome on windows it works too :

[rich20]

Ok, I tested it again. The uploaded PDF files are not broken. It seems, the Linux browsers Opera and Chromium are not able, to display these protected PDFs. I've tried it in vain with all browser settings.
But interesting, when I download this forum page, I can see the PDFs with both browsers.
I close this issue for now because no user has reported this problem.

[rich20]

https://www.kunena.org/forum/general-questions-and-how-tos/165677-problem-with-pdf-attachments?start=0
Confirmed
I am reopening this ticket because a user has contacted the forum with the same problem.

I have tested it again, the problem also exists with K6.
I think the problem is with Kunena, because when I download the uploaded files to my PC, I can open them with the browser without any problems.
So the PDF file will not damaged during the upload, it is only presented incorrectly in the forum.