Download with this link:
Download the steam for free! just press the link and press download button:
(and make sure you have an empty folder)
Step 1: open your steam
Step 2:Press next if you choose your language
Step 3:Press install button
Step 4: wait until its updated (you can watch youtube first or play games until its not finished)
Step 5: move the shortcut of the steam, And move it to the among us file.
Step 6: now you can open among us.
Maybe this will help your problems!