nice, here is the real error:
It seems that something wrong is going on with plugin DLSSMoviePipelineSupport
Do you have this plugin installed for UE 5.3 ?
I always use plugins installed inside of the Project folder, not in the Engine itself, so I’m a bit unaware how transition between Unreal versions looks like and what happens with the plugins during said process.
There is a post which suggests a solution for your problem:
I hope, this will be helpful. If not, I’m afraid, I can’t help more 