Traceback (most recent call last):


 "./freqtrade/main.py", line 89, in <module>

main(sys.argv[1:])


 "./freqtrade/main.py", line 35, in main

args.func(args)


 "/home/emma/Desktop/Trading Bot/freqtrade/freqtrade/optimize/hyperopt.py", line 352, in start

hyperopt.start()


 "/home/emma/Desktop/Trading Bot/freqtrade/freqtrade/optimize/hyperopt.py", line 306, in start

f_val = self.run_optimizer_parallel(parallel, asked)


 "/home/emma/Desktop/Trading Bot/freqtrade/freqtrade/optimize/hyperopt.py", line 269, in run_optimizer_parallel

wrap_non_picklable_objects(self.generate_optimizer))(v) for v in asked)


 "/home/emma/Desktop/Trading Bot/freqtrade/.env/lib/python3.7/site-packages/joblib/parallel.py", line 930, in __call__

self.retrieve()


 "/home/emma/Desktop/Trading Bot/freqtrade/.env/lib/python3.7/site-packages/joblib/parallel.py", line 833, in retrieve

self._output.extend(job.get(timeout=self.timeout))


 "/home/emma/Desktop/Trading Bot/freqtrade/.env/lib/python3.7/site-packages/joblib/_parallel_backends.py", line 521, in wrap_future_result

return future.result(timeout=timeout)


 "/home/emma/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 435, in result

return self.__get_result()


 "/home/emma/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result

raise self._exception
TypeError: reduce() of empty sequence with no initial value

Traceback (most recent call last):


 "/usr/lib/python3/dist-packages/scripts/mbusb_gui.py", line 349, in install_syslinux

syslinux_default(config.usb_disk)


 "/usr/lib/python3/dist-packages/scripts/syslinux.py", line 107, in syslinux_default

mbr_install_cmd = 'dd bs=440 count=1 conv=notrunc if=' + mbr_bin + ' of=' + usb_disk[:-1]
TypeError: can only concatenate str (not "NoneType") to str
