Check whether you followed all these instructions:
HONEYBEE
Install Radiance to C:\Radiance by downloading it from this link and running the exe. NOTE: The default installation path for Radiance is set to C:\Program Files(x86)\Radiance which should be modified to C:\Radiance.
Install Daysim 4.0 for Windows to C:\DAYSIM by downloading it at this link and running the exe. If that link is not accessible, please try this link.
Install the Latest OpenStudio by downloading and running the .exe file from this link.
Install Berkeley Therm 7.6 by downloading and running the .exe file from this link. Note that Honeybee does not work with the newest, 7.7 version (!), so download 7.6 instead (toward the bottom of the page).