I want to know about Servicemax, Is anybody aware from where I can learn about servicemax.

Challenge not yet complete... here's what's wrong:  There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check 

Whoever is stucked here the solution this is :
Please go to the dashboard you created and refresh it then again chcek it definately it will resolve this error, You don't need to create another org or have to again create new playground, Just go and refresh the dashboard and check it , still not resolved the  it will show you the error regarding dashboard question which will be able to solve .

Please mark this answer as best answer if you find it usuable so that people facing same issue can do this as I was also stucked for two days  . 

There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: FYUGAHXE

Challenge not yet complete... here's what's wrong:  There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check 

Whoever is stucked here the solution this is :
Please go to the dashboard you created and refresh it then again chcek it definately it will resolve this error, You don't need to create another org or have to again create new playground, Just go and refresh the dashboard and check it , still not resolved the  it will show you the error regarding dashboard question which will be able to solve .

Please mark this answer as best answer if you find it usuable so that people facing same issue can do this as I was also stucked for two days  . 

There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: FYUGAHXE

I cannot locate the Branding folder to get the Ursa Major Solar Logo to add to the letterhead portion of Challenge 4. Both in Lightnining and Classic, I've clicked on the Select Logo button and the only folder in the dropdown menu to select is "My Personal Documents". No other  folders to select. I can't find the logo to insert into the leterhead and I'm stuck here until I can find that logo file. How do I get to the Branding folder so I can retrieve that logo? I'm greatly appreciate so assistance on how to get that, please.