How to Fix Problem - Add Trendline function grayed out?

Add Trendline function grayed out

I have a chart that does not allow me to 'Add Trendline'.
I changed the bar graph from 3D to 2D but the 'Add Trendline' option is still grayed out.  The file is .xlsx.  I copied and pasted the chart into a new file and the 'Add Trendline' function was
still grayed out.
Do you know what the problem could be?

Solutions to the Problem Add Trendline function grayed out

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Make Sure that your System Meets the System Requirements

This error can be due to some configuration requirements for you system. If your computer hardware is not up to par, then make sure you update where necessary before continuing:

Microsoft Windows Requirements :

• 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
• 16 GB available hard disk space (32-bit) or 20 GB (64-bit)

Another Safe way to Repair the Problem: Add Trendline function grayed out:

How to Fix Add Trendline function grayed out with SmartPCFixer?

1. Click the button to download SmartPCFixer . Install it on your system.  Open it, and it will perform a scan for your system. The junk files will be shown in the list.

2. After the scan is finished, you can see the errors and problems which need to be repaired.

3. The Fixing part is done, the speed of your computer will be much higher than before and the errors have been fixed.

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