Cifs: "mount error(20): Not a directory" while mounting

check what you have

file /mnt/Folder

Is it yours or copied from a random guide?

:man_shrugging:

This

//xxx.xxx.xxx.xxx/Folder /mnt/Folder cifs vers=1.0,credentials=/home/myname/.smbcredentials,uid=xxxx,gid=xxx,iocharset=utf8 0 0

Do you actually own this - then everything is wrong - it actually lloks like a copy paste from a random guide on the interweb

Mount manually using mount command if you are unsure of the options needed

mkdir ~/temp
sudo mount -t cifs //ip.x.y.z/share temp

A very thorough troubleshooting guide

A from scratch