I have the same issue, I want to try my new map (this is the first one!) but I can’t, I’m not sure for what.
The steamCmd client response:
Preparing update...
Preparing content....................................
Uploading content...ERROR! Failed to update workshop item (Timeout).
On folder: workshopbuilds I see this log:
[2016-04-18 19:48:06]: Removed: preview.jpg (12 kB)
[2016-04-18 19:48:06]: Summary: 8 files added, 7 files changed, 1 files removed
[2016-04-18 19:48:11]: Uploading new manifest (5076 bytes).
[2016-04-18 19:48:24]: Uploading 30 out of 30 missing chunks.
[2016-04-18 19:48:40]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/0c71cee7b02b349373d878d11d20684ac78be8f2/3617140199" (Error code 408)
[2016-04-18 19:49:01]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/720202978dbcefdf828775a1d699b7693f16fd1d/2476289705" (Error code 408)
[2016-04-18 19:49:04]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/38019e08e8eb3b6b922c22c770255a333b96b560/1654459157" (Error code 408)
[2016-04-18 19:49:05]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/6240caf62fe8830175404b5b829e2c9bc6a3e3c9/590848892" (Error code 408)
[2016-04-18 19:49:05]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/71fe7f70108662c49e93c1ac1436c502246e3f53/120178637" (Error code 408)
[2016-04-18 19:49:05]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/67ae0bd80923b21e46af91e079ca0f10f80c0ffd/70839710" (Error code 408)
[2016-04-18 19:49:12]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/50a1d5eda98ba655eb52cfbfdcd2355e726544ff/2105770647" (Error code 408)
[2016-04-18 19:49:21]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/112a232839f5d868919330bce1fc84d0637c9349/3127856507" (Error code 408)
[2016-04-18 19:49:21]: Retrying chunk for URL "/depotupload/4518979656392128423/chunk/5a0c61b6404755b39d0f648d875a9e862dfe9b4f/3255949009" (Error code 0)
I don’t have problem with my connection or bandwithd