The error 'The network path was not found' is given back when Lansweeper is unable to access the C$ of the machine where the package is being deployed on. Being able to access C$ on the target computer is a requirement in order to successfully deploy: https://www.lansweeper.com/knowledgebase/deployment-requirements/
Ensure that the scanning credentials submitted under Scanning\Scanning Credentials in the Lansweeper web console have access to C$ on the target machines, as Lansweeper uses this folder to store an executable called RemoteDeployment that will run the deployment. If access to C$ is denied, your deployments will fail. You can test this by browsing to \\hostname\c$ from the Lansweeper server to the target computer with a failed deployment using the same credentials as you are using to deploy.
You can also check the following articles on how to enable admin shares:
https://support.microsoft.com/en-us/help/946937/network-location-cannot-be-reached-when-accessing-shares
https://superuser.com/questions/328461/how-to-access-c-share-in-a-network