Formula error

Please use the formula evaluate function.
Go to Formula Tab, select in Formula Auditing the Evaluate Formula.
Step through the formula to see where the error occurs.

The screenshot as well as the formula is not completely visible to investigate in more detail

Hi! Please include the exact formula and error value, such as #VALUE!, #N/A, or “There's a problem with this formula.” Also mention your Excel language, because some regions require semicolons instead of commas. Checking referenced cells for numbers stored as text is another good first step.

Excel doesn't know what PossiblePtsMid means. It's looking for a named range (a saved group of cells), but that name doesn't exist in your workbook yet.

The Fix (pick one):

Option 1 – Define the named range (best way)
If you have a row with the maximum points for each column (D through R):

1. Select all those max-point cells (e.g., D1:R1).
2. Go to Formulas > Define Name.
3. Type PossiblePtsMid as the name, set Scope to Workbook, and click OK.
   Your formula will now work.

Option 2 – Use a single total number
If you know the total maximum points (say 300):

1. Type 300 into any empty cell.
2. Select that cell, go to Formulas > Define Name, name it PossiblePtsMid, and click OK.

Option 3 – Quick shortcut (skip naming)
Just replace SUM(PossiblePtsMid) with the actual total number. For example:
=IF(SUM(D10:R10)/300<70%, "Warning!", "OK")

Note…
Your columns AC, AD, and AE also show #NAME? – they likely use other missing names. Fix them the same way (define those names or replace them with numbers).

That's it! Start with Option 1 if you have a points row.

My answers are voluntary and without guarantee!

Hope this will help you.

It would help if you included the whole formula.  Also, what is "PossiblePtsMid" ?  Is that a valid named range or values?  If you click in the cell and highlight that name and then hover over that highlight does it show values or #NAME? and/or highlight the whole SUM(PossiblePtsMid) and does it show the correct sum you were expecting or #NAME?

If that isn't the issue and there isn't something after the "Warning!" (i.e. in the false conditional output) then is is possible the version/location your are using is expecting semi-colon instead of commas?