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Justas BalciunasJustas Balciunas 

Work with Custom Lightning Components not able to install the unmanaged package

Hi,
I am trying to complete the trail as I am not able to install the package and get the following error
Install Contacts Today
By salesforce.com

This app can't be installed.
There are problems that prevent this package from being installed.
Insufficient PrivilegesYou do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary

Thank you for your help
Best Answer chosen by Justas Balciunas
DeepthiDeepthi (Salesforce Developers) 
Hi Justas,

Make sure that you have logged into right developer/ playground account. If you are working on Trailhead playground account, then reset the password. 
https://force.desk.com/customer/en/portal/articles/2659738-find-the-username-and-password-for-your-trailhead-playground?b_id=13478 

Hope this helps you!
Mark this post as Best Answer if it answers your question.

Thanks,
Deepthi