Can't install via Steam

[midnight oar]

Hey, everything is shown on video. Help

Restarting steam and so on does not work.

[teal elk]

https://help.steampowered.com/en/faqs/view/21F5-8D5D-0141-7A5E#:~:text=Restarting the computer flushes all,on files and other resources.&text=Clearing the Steam download cache,from the Steam servers again.