Error uploading, check if the selected board is currently available

Please can you advise how to correct this. I can't upload my sketches.

Can someone please help? I can't upload my sketches. A message comes up saying "Error uploading, check if the selected board is currently available"

DON'T CROSS POST!!!!!!!!!!!!!!!!!!!!

I HAVE REPORTED THIS THREAD TO THE MODERATORS

Might I suggest you read the sticky posts at the top of the editor section first and add any additional information.

It is difficult to advise when there is not a lot to go on.

Threads merged.

There are a few threads (stickies) at the top of this forum section. Did you read them? Why not?

If you did, why did you not post some useful information like
Which board?
Is it recognised?
Original or clone?
Which IDE version?
Which OS and version?