checkm8-a5:4:10: fatal error: constants.h: No such file or directory #include "constants.h"

[gunmasterg9]

Arduino: 1.8.19 (Mac OS X), Board: "Arduino Uno"

checkm8-a5:4:10: fatal error: constants.h: No such file or directory
#include "constants.h"
^~~~~~~~~~~~~
compilation terminated.
exit status 1
constants.h: No such file or directory

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[misterwaztaken]

this is two years old but try putting the "constants.h" file with the library files (so constants.h should be in the same directory as Usb.h)