Yep same here!
Here's how it looks like
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3542344955

It's also, account dependent, I can change account and the library view goes back to normal.
I've tried deleting the /userdata/id folder but didn't work.

OS
Windows 10 22H2

Thanks for the report. Can you look in userdata/<your accountid>/config/cloudstorage and tell me what you see in there? Filenames and sizes would be useful.

cloud-storage-namespace-1.json 43kb
cloud-storage-namespace-1.modified.json 1kb
cloud-storage-namespace-3.json 1kb
cloud-storage-namespace-3.modified.json 1kb
cloud-storage-namespaces.json 1kb

that's everything in the folder

Originally posted by philipla:

Thanks for the report. Can you look in userdata/<your accountid>/config/cloudstorage and tell me what you see in there? Filenames and sizes would be useful.

/userdata/94650134/config/cloudstorage
in bytes

(105637) cloud-storage-namespace-1.json
(2) cloud-storage-namespace-1.modified.json
(78) cloud-storage-namespace-3.json
(2) cloud-storage-namespace-3.modified.json
(29) cloud-storage-namespaces.json

cloud-storage-namespace-1.json is full of null characters

Also experiencing this bug. Seems only switching to stable will fix it.

Tried clearing download cache and html, resetting storage path, signing out and in, completely uninstalling, and regenerating sharedconfig.vdf.

OS
Arch Linux 6.15.9-arch1-1

I fixed it by deleting the contents of "cloud-storage-namespace-1.json" while having Steam open and then restarting Steam.
My shelves got deleted tho.

If anyone who is still experiencing the problem is so inclined, could you email me the contents of that directory? My username @valvesoftware.com.

Email sent. Eseman's fix also worked for me. I deleted the cloud-storage-namespace-1.json file and and restarted steam and it was fine

Originally posted by philipla:

If anyone who is still experiencing the problem is so inclined, could you email me the contents of that directory? My username @valvesoftware.com.

I should've saved a copy of that, sorry. But I need to correct my original post.
I didn't delete the whole /userdata/id folder (I had to check my recycle bin)
I deleted the most recent modified files in /user/id/config/ (Stable->to beta)
localconfig.vdf, licensecache, shortcuts.vdf, /librarycache/ and /grid/.
I never deleted /cloudstorage/ because it wasn't recently modified when I changed from stable to beta to make the error appear.

If its helpful, I used a hex editor on "cloud-storage-namespace-1.json" and the characters in the whole document were null bytes. Like the highlighted image on this stackoverflow post
(https://stackoverflow.com/questions/32624150/trim-not-working-on-null-characters)
All 105637bytes were null. All of the other files had a correct format, starting with "[" and ending in "]".

All null bytes in the file is consistent across every example I've seen. The next client beta (should be today) will have a fix for loading that file. I'm still trying to figure out why only zeroes are being written in the first place.