This bug has been reported over the years but i couldnt find the fix, or an open bug report, and it is sitll very present.
The API Token is not valid on exporting the world, meaning i cannot export the world for backup purposes.
Also the bug report search fearure may also be broken as i can find bug reports via google but not within the reporting site.
Export World - Input API Key
Same here, I was able to make 2 exports yesterday (21/04) but I now run into the same issue.
we did deploy a possible fix for the api today