In the Main Adversary Type description in the Plot template (in the options that open up if you choose Adventure just under the main text box), you have "Nemeis" instead of "Nemesis".
Steps to Reproduce
Open Plot template
Just under the main text box, there are buttons for "Adventure" and "Adventure Phase". Click "Adventure".
Scroll down to the section labeled "Main Adversary Type".
The description with the typo is immediately under the text box for that section.