Why can't I download these files?

For some reason, I cannot download and save files on the demo launcher. Here are five of them:
eo_uy.lang
es_ar.lang
es_uy.lang
es_ve.lang
et_ee.lang
Any tips on how to solve this problem?
Sincerely,
MegaElectricTiger
P.S: I own the demo version, not the full version, and if you want to contact me, my username is MegaElectricTiger or Willaisanevilcat. I tried deactivating my firewall, but it still didn't work.