Download Problem from external storage

HI, vary urgent!!! I’ve upgraded Nextcloud 27 version to 29. Users authentication is through LDAP. using External storage SMB/CIFS. When logged in everything works fine. External files are listed and can be edited in NEXTCLOUD OFFICE too. but when tried to download the file it says “Network error, check internet connection”. PLease help…

Can you may provide more information, there is a formula, wich you can use.