How to fix '[error] submission with curl() was not successful' in Octave, Coursera ML exercise?

Question

I'm unable to submit the programming exercise of the ML course by AndrewNg on Coursera. Whenever I try to submit the assignment, the following error pops up and submission fails.

[error] submission with curl() was not successful
warning: findstr is obsolete; use strfind instead

I've tried upgrading the version of the Octave used, but the error still pops up. While running the code, the result is absolutely correct though.

Answer 1

Yeah if you are using UNIX based systems try doing

 sudo apt install curl

do this in the terminal , it worked for me. I'm assuming this is Andrew NG's ML course