Factor Analysis Error

Hi All, I am trying to run a factor analysis for a pilot study for a client. I can do PCA without any issues but receive the following error message in the correlation matrix "This matrix is not a positive definite." Unsure why it is doing this here but not in the PCA. I think it might be due to having the same number of variables to cases, which is only 10. Would I need to have more cases in order to make this run? Unsure if you need to see the data to help! Any advice is appreciated.