Nextcloud 19 and external Storage

Good evening,
I installed the new version (19), and configured the integration with LDAP. So far so good, but when I try to share the folder that are on the Windows Domain, it doesn’t give me an error, but when I try to access it, it gives me a WEBDAV error and also on the Client, the 500 error can’t connect!
Attach the error that appears.
Has anyone encountered this problem in this new version?