Now you should be able to upload directly.
Regarding the issue, CalculiX has some problems with shells in linear dynamics: Utilities to handle ccx issues with shells in steady state dynamics
In this case, the workarounds from that thread didn’t help and even simplifying the model to the minimum did nothing. The only way I’ve found to be working for now is to use the Thicken Shell Mesh tool to run this with solids instead of shells.
You should also increase the maximum number of increments because the default 100 is not enough in your case.
Beam mod.pmx (3.1 MB)