After updating to 1.55 I was unable to mount with CIFS through the LIB UI
got ERR 13 .
looking into the advanced options i found that the mount flags were missing the security setting.
once added, the mount was ok.
adding another mount i discovered that additional parameters disappeared from the mount flags. strange ?!
anyway - i copied the flags string and again it was ok.
This is the one i used
I hope it helps anybody that might encounter this.