Aluminium bifold door won’t open

[Diynot@19]

Any ideas how I can repair this & What’s wrong why won’t it open? I went out in the morning & locked it ok later same day it wouldn’t open


https://imgur.com/gallery/v4uic5w?s=sms

 

[foxhole]

May have dropped a little , which will jam things up, can you lift door slightly while trying handle [no video].Won't open or unlock?

 

[God]

probably dropped and catching on the bottom or a keep. needs toe and heeling