first obvious thing to ask is if you collected all the textures on the machine where you were working on, to somewhere on the server (i suppose you're using one?) where all machines can reach the same textures, on the same path?
Those textures are stored localy on your C somewhere no?
If those other nodes try to do the same thing, and reach for that path, to their personal local map with those textures supposedly, it's possible they don't if you are for example using high rez and they wouldn't be installed on the node ones?
Population has a seperate download. Always simply best to collect to a project-asset folder... no?
https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/sfdcarticles/sfdcarticles/How-to-i...
https://knowledge.autodesk.com/support/3ds-max/downloads/caas/downloads/content/3ds-max-2018-populat...
Check the max version you're using, download accordingly and try those forums. I had same problem, my case was that I simply had to collect, even if those node machines can find the same textures in their own local maps.