Internal error, yaws code crashed

ERROR erlang  code  crashed:
 File: appmod:0
Reason: {no_application_data,"Did you forget to call erlyweb:compile(AppDir) or add the app's previously compiled .beam files to the Erlang code path?"}
Req: {http_request,'GET',{abs_path,"/p/ve7FoLVbegt"},{1,1}}