I'm having issues uploading my game (about 5.5 gigs) through butler. The first time, although it took a while it seemed to upload or nearly finish uploading before the error came up:

PS C:\windows\system32> butler push "G:2020\Defective Holiday\Builds\Latest" kimlaughton/defective-holiday:win-beta
creating build on remote server: Post https://api.itch.io/wharf/builds: context deadline exceeded

But now when I try the command the error pops up almost instantly.

There have been a few other posts about this but I'm not sure exactly how people managed to solve it.

For anyone else with the same problem, I managed to solve it kind of accidentally! I added -v to the upload command expecting it would give more info about what was going wrong but it actually seems to change the way the upload occurs. The context deadline error vanished and the uploader was far more reliable when the connection dropped out during the upload.