1040 SR STANDARD DEDUCTION line 10b has $6000 deduction shown as error, $6000 shown on line 10c, ok & reduces tax.

I am using TT 1040 Premier on PC.    Taking standard deduction.   1040 SR line 10b asks for contributions so I selected + and entered $6000 of Charitable Contributions on the popup schedule.  The $6000 was moved to line 10c which reduced the taxable income and the tax, this was good.    

However line 10b shows red, an ERROR?     The 1040SR also shows an error.    I called support but didn't get a final resolution; I was told that I could deduct more than $300; literature on this is not clear.     Do I need to put contributions into the section on Itemize deductions for charitable contributions even if I am taking standard deduction?   HELP