When following this tutorial on youtube I encountered an error.
https://www.youtube.com/watch?v=W6pPZljNGR0&t=112s
When I got to saipen I found that my textures were completely white I have searched around for an answer but no thread was able to fix my problems. Any suggestions?

What my map looks like in saipen
https://imgur.com/a/rhC9ARc

White geometry means that you didn't set up the shaders. The shader tags are not referencing any bitmap tags. Halo by default will generate shaders in the main tag directory after you compile a model or BSP.

Foe some reason Halo was not generating a file for me so I created one of my one using information found in this thread.
http://forum.halomaps.org/index.cfm%3Fpage=topic&topicID=32817

I am still encountering the same problem after re-structuring the map. What am I doing wrong here?
Shader file and map files in tags
https://imgur.com/a/xenoV0m

Where did you install Halo? Make sure you installed to a folder that you have control over. Halo by default installs to the "Program Files" directory, you need to move that folder somewhere else, because the tools don't have permission to write data in that directory.