Can't determine relationship between fields - although indirect relationship exists

[Ardio]

Hi everyone,

I have run into a weird error that I will explain here: 

I have a model with couple of tables connected with each other thorugh  the fields that I have shown in the picture:

Although the table "Circulum unpivot" and "Course_ScheduleNew" are connected as per the screenshot and also "Circulum unpivot" and "Facilitators_courses_list" are also related indirectly but I get the following error when I try to visualize them on the same visual:

I would highly appreciate your help!

Thank you

[amitchandak]

@Ardio , can you share what field you are taking from which table

[Ardio]

@amitchandak already showed it on the screenshot:

From CURRICULUM UNPIVOT to COURSE_SCHEDULENEW using Course_name

From COURSE_SCHEDULENEW to FACILITATORS using trainers to Superusers(Faciliratotrs) 

From FACILITATORS to FACILITATORS_COURSE_LIST using Superusers(Faciliratotrs)

Thank you again in advance!