If a 403 error occurs in the launcher, you need to set full rights for the current user (folder properties, Security tab) for the game folder and the launcher folder. Also temporarily disable all antivirus and protection programs, such as Windows Defender, or add the launcher and the game to the white list.
If this does not help, then check the availability of the escapefromtarkov.com website, try logging in to the profile. If the error "Our systems detected suspicious traffic from your computer network" appears, use this instruction https://www.escapefromtarkov.com/support/knowledge/404
