Thermal Printer does not connect ...?

[garabik]

I independently came to the same solution, and when going to post it to the forum, I found this post… anyway, I would suggest editing /etc/apparmor.d/local/usr.sbin.cupsd instead and you just need to add the line

/dev/pts/1 rw,

there. This way, you keep the original file intact.

[zedr0k]

I had the same problem. After adding the new rule it works again. Thank you.