Upon using 5 or more mirrors I can't craft the TLTPrism but using 2,3, or 4 I can. The instruction book states I need a minimum of 5 mirrors.

recipies got changed and are getting changed in the next update. very sorry for the inconvenience.

No worries. Just trying to make things from the manual.

Closing this issue for clean up.
things have changed with the port to 1.12.2 and i wont support lower versions.
If the problem still occures do not hasitate to create a new issue!