Upon launch, calc throws an error that MFPlay.DLL is missing. The DLL belongs to “Microsoft Media Foundation”, which isn’t present in the LTSC versions and cannot be installed as a feature.
It would probably be advisable to avoid dependancy on MF entirely.
so I will replace your tag ‘base’ with ‘calc’
That DLL exists “out of the box” after installing both Windows 10 Entreprise LTSC 2021 and the IoT LTSC 2021 variant. Which LTSC version are you using?
I’m sorry. I forgot base was the database component. It seemed to affect the whole suite, so my brain went “hurr durr it’s the base”.
I was back at the office today. The version is Windows 10 Enterprise N LTSC German. I checked the system and the corresponding install.wim. The latter has both editions indexed (Regular and N). The reguar edition ships with mf*.dll. On N they are missing. Accordingly, calc fails to launch, complaining about the missing files. I skipped WinSxS and plainly extracted mf*.dll from the WIM into C:\Windows\System32. It’s a dirty hack, but that lead to a successful launch.
Media Foundation started being using in LibreOffice in scope of tdf#159292, in v.26.2. Since you’ve found out that this OS component is optional, and may be missing on some systems, file a bug report.
Also, there is a MS feature pack for N editions: Media Feature Pack list for Windows N editions - Microsoft Support