You receive an MSI error 1619: "MSI file not found" or "This installation package could not be opened"
One or more files required by the installer could not be found or read. Verify the installer and all files associated with the installer exist and are accessible and can be read by the user account used to deploy the package (at a minimum, read-access).
If the MSI refers to other files during installation, you may need to check the box to "Include Entire Directory" in your deployment package so it brings over any relevant files in the same source folder.
In certain rare cases, the MSI in the package's "Install File" path is opened in another program, such as Orca.