Upload failed with ERROR : can only concatenate str (not "NoneType") to str

[cmatrask]

Received this error doing the tutorial training. What do I do now?
cmatrasko@wintrust.com
Thanks much,
Cheryl

[amesser]

Hi.

I recommend A) trying again (maybe after restarting your computer) and B) emailing Education_AMER@splunk.com if the issue persists.