Cannot create a torrent for the nonexistent data

[SupplyDevalue]

I installed i2p for Ubuntu using the method here: https://geti2p.com/en/download/debian

sudo apt-add-repository ppa:i2p-maintainers/i2p
sudo apt-get update
sudo apt-get install i2p

i configured and set i2p and it seems to work fine

However, when i try adding a file or folder to seed in i2p snark and create a torrent, i get this message:

"Cannot create a torrent for the nonexistent data: <file or folder path>"

Maybe its a permission thing, how can i fix this ?

[SupplyDevalue]

I read the "Post-install work" in https://geti2p.com/en/download/debian

And the reason was cuz i enabled i2p as a service using sudo

I followed this instruction:
""on demand" using the i2prouter script. Simply run "i2prouter start" from a command prompt. (Note: Do not use sudo or run it as root!)"

and it now adding torrents to seed works fine