Expiration date &1 for URI &2 has an invalid format

What causes this issue?

An expiration data always has the format yyyy-mm-dd. This condition is
not fulfilled.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

This is a program error. Check the sent request (class
CL_DAS_WEBDAV_CLIENT->EXECUTE) to see whether the date is incorrect.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.