iPad setup error: 'Unable to Download Profile Configuration

With your iPad attempting to download a configuration profile, the iPad is (or at least was) a device managed or owned by an Enterprise or Educational establishment. As such, unless the configuration profile is removed by the organisation that manages the device, it would be unusable by you or anyone else.

Apple will not assist with removal of management profiles. The only way to remove a management profile is to seek assistance directly from the System Administrator who manages the device.

Install or remove configuration profiles on iPad - Apple Support

You purchased an iPad that was not properly and thoroughly cleansed by its previous owner. Get a refund if possible or have the previous owner properly cleanse it as follows:

What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support

Here is what Apple suggests when purchasing a previously used device:

Check for Activation Lock before you buy a device from someone else

Before you buy an iPhone, iPad, or iPod touch, from someone other than Apple or an authorized Apple reseller, make sure that the device is erased and no longer linked to the previous owner’s account. Follow these steps to check if the device is ready to use: 

1. Turn on and unlock the device. 
2. If the passcode lock screen or the Home screen appears, the device hasn't been erased. Ask the seller to completely erase the device by going to Settings > General > Reset > Erase All Content and Settings. Don't take ownership of any used iPhone, iPad, or iPod touch until it's been erased.
3. Begin the device setup process.
4. If you're asked for the previous owner’s Apple ID and password, the device is still linked to their account. Hand the device back to the seller and ask them to enter their password. If the previous owner isn't present, contact them as soon as possible and ask them to use a browser to remove the device from their account. Don't take ownership of any used iPhone, iPad, or iPod touch until it has been removed from the previous owner’s account.

You will know that a device is ready for you to use when you're asked to "Set up your iPhone," “Set up your iPad," or “Set up your iPod” the first time you turn it on.

Purchasing a pre-owned device from a third-party seller is risky. One of our senior contributors also penned this useful warning:

The All Too Common SAD Reality of Buying … - Apple Community

By the way.

There are certain [quite experienced] people on this forum that would generally advise against purchasing ‘refurbished‘ or generally used Apple devices from third-party sellers.

I just wanted to point that out.

Glad you were able to return it!

In case you’re interested, Apple sells refurbished iPads here.

Certified Refurbished Products - Apple

Enjoy your Apple gear.

EvelynKurt did return it to the seller. Thanks for the assistance though.