The reason is you probably copied that line from a hacking article that was based on BackTrack which may have had such a path, but since you said you are using Linux Mint, you don't have that. So it is exactly as the error says, you probably don't have that file.
But you don't need that particular wordlist to test whether aircrack-ng works on your own wifi.
It is your own wifi so you know the password, so you could just make a text file of your own, where each line is simply a password you make up, that you want aircrack-ng to try, and be sure you include your actual wifi password in there. You could have just two lines and the third line is your actual wifi password.
For example you can edit with
and inside you could just have
It doesn't have to be nano, whatever text editor you are comfortable with. It doesn't have to have
.lst extension, it is just to make it easier for you to recognize it in the future as a list.
When you are done saving it then you can use aircrack-ng again, only this time point it to the wordlist you just made:
aircrack-ng CrackFile.cap -w ~/mywordlist.lst