Solved Cannot attach jpg - mime type error

I continue to test. I am testing every jpg from August 2020, that I have imported into Windows 10 from my Iphone. These images have not been altered other than being transferred. 75% of the jpg's will not attach and get the error. 25% of jpg's will attach just fine. Pictures that were taken back to back, one works, and one does not.

I can confirm that prior to upgrading to Kunena 5.2 images were successfully attached, that are not able to be attached now. I have proven this with testing multiple images.

Example: I updated to Kunena 5.2 on Jan 1, 2021. In actuality, I probably missed 5.2 and upgraded straight to 5.2.1 based on availability timeline. I was able to download a users attachment from their id directory in attachments from Dec 12, 2020 from the server. I then tried to attach that same picture, and received the error.

For the past few weeks, I can see that very few jpg's from phones have been attached. Many of my users are taking screenshots of their photos and then uploading those - which works in every case I have tried / seen so far.

Nothing else has changed on my vps except for Joomla and kunena updates.....and some other updates such as akeeba etc.

I will note again that I have no problems uploading any of these images in the joomla backend.  Also to clarify, this has nothing to do with image insertion, its upon selecting the image to attach.

Please upload again here the zip file only as attachment, as you can see, your previous file is not displayed.
www.kunena.org/forum/k-5-2-support/16067...error?start=0#215554
I found it only, because I've edited your message and clicked on the attachment button. Maybe it was only random, but it could also be a hint to this bug if it happens again.

ok I will try to insert it too - event though I know with a zip there is nothing to show. 

And here I will attach without inserting - since I could actually see it in the previous msg.

I would be more than happy to setup an account for you on my site to see.

You can use the confidential tags (padlock symbol in the editor), then are this info visible only for you and moderators here. An account for the frontend (Registered user) would be enough.