1.Please try another article to see if you get same error?
2.If the error still happen, it maybe you load a bad thesaurus.
Please right click the spinnerchief 4 icon on the whitehatbox app, and select "browse to local folder", then delete the folder named "CTDownload" in the opened folder, then run sc4 again to download cloud thesaurus again, then try again.
3.If other artilce works, the problem is related to the article. please post the article and your spin settings here, we will make a check and fast fix.
4.I hope my clarification has been helpful ,if not, please feel free to contact us ,our programmer will help you solv your problems asap.