Nextcloud Client version: 30.0.10.1
Operating system and version:
Container host: Rocky Linux 9
Desktop client: Windows 11
PHP version: 8.3.20
The issue you are facing:
After I updated my container, my users are facing the issue where it shows “server reported no ETag” issues.
Is this the first time you’ve seen this error?:
Yes, this is my first time seeing this particular issue among few other nextloud instances that we ran. And i am quite new to nextcloud 
Is there any reason why you are posting a question twice within 2 hours?
that was my mistake. I forgot that it was in review by mods and I posted it again 
I actually dont know what happened but updating the container and restarting it for few times worked. I’ll just keep this for me and other future noobs to refer.
and some answer from reddit post:
If you have external folder, reinstall smb client. Reboot your PC. Reboot your NC instance.
Do you have a proxy or fw between? Are you hosting on a Plesk? Which file formats are those?```