Hello djem38
This error states the students_join_users
table does not have the student_id
column.
This should not be the case, hence your error: "column "student_id" does not exist"
Could you please run the following SQL query first so we know whether the student_id
column exists or not?
SELECT student_id
FROM information_schema.columns
WHERE table_name='students_join_users' and column_name='student_id';
You can execute this SQL command using phpPgAdmin for example.