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CCS/CC2640: 'com.ti.rtsc.TIRTOSCC13XX_CC26XX' v2.21.1.08 is not currently installed

Part Number: CC2640

Tool/software: Code Composer Studio

In ccsv9, I get the following error: Description Resource Path Location Type Product 'com.ti.rtsc.TIRTOSCC13XX_CC26XX' v2.21.1.08 is not currently installed and no compatible version is available. Please install this product or a compatible version. simple_peripheral_cc2650lp_app simple_peripheral_cc2650lp_app Problem

I have C:\ti\tirtos_cc13xx_cc26xx_2_21_01_08 installed.

I don't see any issues in Project > Properties > Build > ARM Compiler > Include Options.

I don't see any issues in Project Explorer > Includes

How do I fix this error?