#include "capacativeKey" --> #include "CapacativeKey"

[Kvathe]

As implied by the title, there is a case mismatch between the #include statement and the filename of the CapacativeKey header.

Another less severe issue is your use of "treshold", correctly spelled "threshold."

[collinsample76fallo1111]

i have the same issue

[collinsample76fallo1111]

@Kvathe plz fix

[collinsample76fallo1111]

or tell me how to fix

[Kvathe]

@collinsample76fallo1111
As the subject implies:

Change "capacitiveKey" to "CapacativeKey" in the third line. It's currently a typo and will not correctly include the library.

[collinsample76fallo1111]

thank you
@Kvathe