I just can't understand what should i do. Appreciate any help and thanks is advance.
Regards
Moving to Quiz forum...
The categories being referred to are the question categories. It is saying that you have categories in your database like category 2 has parent category 3, and category 3 has parent category 2. This should never happen.
The only way I can think of to fix this is to look directly in the database, in the mdl_question_categories table. Start with the row with id = 2, and follow the chain of parent links to see what is going on. Probably, if you change the parent of one of them to 0 (meaning top) it will start working again. (However, directly editing things in the database is potentially dangerous.)
The real question is: how did this course get into this broken state in the first place?
Thanks Tim.
I go through the way you showed. I go to database and searched with my course name ('foundation') string in question_categories table. what i found is in screenshot. Please show me the next way.
Regards
So that is the shortest possible look. Category 2 is claiming to be its own parent.
It should be safe to edit that row (the one with id = 2) and change the parent value to 0 there. As SQL that would be
UPDATE question_categories SET parent = 0 WHERE id = 2
You could also try the search
SELECT * FROM question_categories WHERE parent = id
to see if there are any more of these.
wow...many many thanks Tim.
problem is perfectly solved. Just run sql update to set parent = 0 and everything is working perfectly now.
Run also sql search for parent = id, found only that one.
Thanks and gratitude again.