Comment # 3 on bug 1161548 from Christophe Giboudeaux

(In reply to Nathan Wolf from comment #2)
> Created attachment 828297 [details]
> Kdenlive Crash Report 20200126
> 
> As of Tumbleweed snapshot 20200121 Kdenlive will not load previously created
> projects.

Install the package from
https://download.opensuse.org/repositories/home:/cgiboudeaux:/branches:/KDE:/Applications/openSUSE_Factory_standard/
and retry