WebDav Error (400 Bad Request) PROPFIND

I received the following message from IT Support for our webserver.

Hello,

I have tried everything that is available on the online documents to fix the errors but I am sorry to report that there are still issues that seems to be needing someone from the developer side. For eg the error

The “Strict-Transport-Security” HTTP header is not configured to at least “15552000” seconds. For enhanced security we recommend enabling HSTS as described in our security tips.
This is already set as per the configs, by adding virtual host entry as said on ownCloud Documentation Overview but owncloud is not detecting it.

“Some files have not passed the integrity check”
These relate to the files

  • core/img/favicon.ico
  • core/img/favicon.png
    I am not sure if you have alerted the defaults coming with the installation. Nevertheless it should not cause the issue. If you have not replaced the said files to something from your end, you can fix this by re-downloading the files from owncloud and placing it on the server.

Regarding webdev, I have checked and confirmed there are no server level issues. The error seems to have come after the last update you did to the owncloud, so you need to contact the developers to see if there is a bug or a configuration change that they have added. We have spent hours on this issue and we try our best to resolve third party software related issues but this has reached a point where you need to contact the developers and have them debug this for you. The issue is way beyond the scope of support that we can provide. Once you get the feedback from the developers, please let us know if there is anything that needs to be done from our end on the server, we will be more than happy to check it out for you.

Regards,
Balakrishnan U
Manager - Technical Support
TotalChoice Hosting, Inc.
http://totalchoicehosting.com/

See the screenshot of the message as well here:

Can you provide some information and clarity on when this bug issue will be fixed? We are unable to use the desktop app or mobile app and sync to the cloud.

Any help you can provide is greatly appreciated!

Thanks,
Shinshuri