Hi vinz243 -
What are the Textures that you are using in your material? Are you using any textures found in the Engine or Plug-In Content? Have you added content from one of the Learn or Marketplace projects to your project? Are you using any textures which have not been imported into the engine correctly (via migrate option) and perhaps just copy pasted into the content folder from another project? Also has the project been converted up to 4.8 or created directly in 4.9?
If you can answer as many of those questions as possible I can try to help narrow down your issue -
Thank You -
Eric Ketchum