dear @Alex T⚜️ Thanks for your guidance. I have checked logs/sys_transcoder.log, it has the following error:

storeFileLocally_Storage failed

It's very strange because the /storage directory has the correct permission (755).

The storage engine is set to 'Local' and I have enough free disk space. It's a dedicated server.

Also, the "Remote Transcoding" option is disabled in Studio > Developer > Settings.

As you suggested to another user in another post who was having the same issue, I have even tried to add the following line to /etc/hosts file:

127.0.0.1 my-una.domain

but that didn't fix my issue.

For testing purposes and to make sure that it's not an issue related to that specific website I am working on, I made a fresh UNA install, no modifications, no data. Guess what! Even the clean UNA installation is having the very same issue:

• The video uploader doesn't display the video preview after the upload is 100% completed. The video thumbnail is broken.
• And No image preview in the photo uploader after the upload is 100% completed. The image thumbnail is broken. The uploaded photo doesn't display either.

It looks like this issue has nothing to do with the SSL Certificate because I set back Let's Encrypt free SSL and problem remains.

Please help. I am running UNA 13.1.0 (stable)

Thanks