Hello @AJ_Keresztes
may I ask you to show log files or errors as quoted text instead of screenshots? This will help others to better read your issue. You can read up details about this in the Getting Started section
Beside this I like to encourage you to follow my suggestion of the previous post.
mongorestore --dryRun mydump/
As mentioned, this requires that you provide the FOLDER not the FILE in the command
Also your error message says it already: please add .bson to the file name and it should work, or add --archive before the file name, then you can omit the extension.
You can find working examples in documentation of mongorestore which I copied in my previous post.
Regards,
Michael