If you click in the cell with #VALUE! Excel will display an error symbol next to it. Point at the error symbol to read the actual error message. Most likely you added ExceLab 365 but did not sign in to enable the add-in. From the Ribbon click Formulas->Account->Sign in.
What if I just have the data, but not the formula?
I keep getting a #VALUE! error. I tried it several different ways and I still get the error
If you click in the cell with #VALUE! Excel will display an error symbol next to it. Point at the error symbol to read the actual error message. Most likely you added ExceLab 365 but did not sign in to enable the add-in. From the Ribbon click Formulas->Account->Sign in.