I'm having the same problem as https://wplms.io/forums/topic/instructor-bio-and-about-data-is-coming-false-as-boolean-value/, instructor bio is returned as false though i added the bio in both the profile and extended profile. I tried to download the modified api-course-controller file on the thread but it was the same version as mine. Please advise.
Please goto wp-admin -> wplms -> buddypress -> " Instructor Description Field ". Add your instrcutor about field there .
It maybe Bio or something else you need to put the name in it (its case sensitive) /.
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After putting the field please make sure that your instructor must have filled some value in it .
If its added correctly and still facing this issue then please share your site url , admin credentials and a valid ftp credentials in private reply to check this issue at your end .