You'll need to do a bit better on the description of the problem.
I surmise that you have a missing font problem but beyond that we know nothing.
What version of ID? What O/S? What fonts? Are the fonts actually installed?
MAC OS 10.9.5
Fonts are installed.
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Which version of InDesign CC and which fonts?
InDesign 2015 version
Presumably you've upgraded to CC2015.2
Which fonts are missing - were they ones that you got from TypeKit?
If they're missing from the font list, be sure you don't have the TypeKit fonts filter turned on.