DLNA not work properly

Hi,
I have problem with DLNA on my NAS TS-451 connect to LG TV.
Media Streaming with DLNA connection stop work properly. Shared folder I see, but empty. No videos, no photos now.
Do you have any idea what to do?

Use a different DLNA server (e.g. twonky or the one in Plex)

Best would be to switch to Plex,emby,jellyfin or direct SMB scraping via KODI, though… soooo much better than DLNA.

For music I can recommend MinimServer. Tagging is very important and should be consistent - I recommend mp3tag.