Hey Barbara,
I’ve investigated the issue and it seems that it is indeed a bug – one letter was missing from the pager code in the last Kanso version; please accept my apologies, and thank you for bringing this up!
Since I cannot seem to be able to access your “Appearance -> Editor” section to editor the code directly, I’m sending you this fixed file: please unzip the archive, and upload the resulting php file into the theme folder (/wp-content/themes/Kanso/). Then refresh the website and check the portfolio page. Please let me know if this solves the problem!
Sincerely,
Andrii / Satori Studio