anova keeps saying I have non-numeric data

Need help in performing ANOVA analysis, as it was clear that I was doing something wrong because I kept receiving the error "input ranges contain non-numeric data".

I have six groups of samples and am trying to compare the mean among the six groups.
I select the samples (A1: F220) and use Data Analysis add-on in EXCEL to do ANOVA.
The same error of "input ranges contain non-numeric data" keeps showing up.

Where did I make a mistake in my performing the ANOVA analysis ?

Please see attachment for the data.

ps. I was able to perform ANOVA if I omit the headings and select only (A2:F220). From youtube videos, I thought it's okay to include the heading. Any idea why including the heading would give me the error message ?

I think you may have forgotten to check the "Labels in First Row" check box.

It ran fine for me with the headers include and the check box checked.