Having the same issues, as https://www.joomlart.com/forums/d/28389-problem-with-guru-links-in-main-menu
I tried to create a link in the main menu, leading to the "Courses category layout" of GURU light.
Unfortunately it doesn't work when you click on it -> It shows an error page "Call to undefined method guruHelper::displayPrice()".
Same when, instead of linking to the "Courses category layout", I try to link to a "Course Layout". Doesn't work ever : Call to a member function getView() on null.
There was nothing posted on a fix that we can do on our end for users using the free version.. So I have been forced to re-post the issue; as I now have the same problem... And would appreciate some assistance.
Thank you
By the way, ran de-bug and mentioned "Parsing errors in langugage files"
JROOT/language/en-GB/en-GB.com_guru.ini : error(s) in line(s) 650, 652, 653, 655, 964, 966, 972, 974
Hope this helps solve this issue.. thanks