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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Some useful links to gather information about your Nextcloud Talk installation:
Information about Signaling server: /index.php/index.php/settings/admin/talk#signaling_server
Information about TURN server: /index.php/settings/admin/talk#turn_server
Information about STUN server: /index.php/settings/admin/talk#stun_server
Nextcloud version (eg, 24.0.1): 32.0.6.
Talk Server version (eg, 14.0.2): 22.0.9
Custom Signaling server configured: yes 2.1.0-docker
Custom TURN server configured: yes
Custom STUN server configured: yes
Talk iOS version (eg, 14.0.2): 23.0.0
The issue you are facing:
Sharing an image or video with the new Talk iOS app to a room into the (server-side) “Talk”-folder, works without issue, also the preview is generated. Clicking on the uploaded image creates a “Error downloading file” error message.
In the apache-log I can see a 404 and webdev-request without the “Talk”-folder in it.
NC WebApp and the Talk-android App show the same file without issues.
Is this the first time you’ve seen this error? Yes
Steps to replicate it:
-
Install Talk-iOS 23.0.0
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Login your NC account
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Upload an image/movie
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Try to open the image/movie
The output of your Nextcloud log in Admin > Logging or errors in nextcloud.log in /var/www/:
Nothing related
The output of your Apache log in /var/log/____:
IP - user [date +0000] "PROPFIND /remote.php/dav/files/userid/image.png HTTP/1.1" 404 1237 "-" "Mozilla/5.0 (iOS) Nextcloud-Talk v23.0.0"
Your browser log if relevant (javascript console log, network log, etc.):
None
