I have Created the Trail object with Description,Distance,Last Inspection Date fields as per the instruction, Iam able to see all the fields created in the Trail object,  But when i submit, it displays error stating
(Challenge Not yet complete... here's what's wrong:
All the expected custom fields for the Trail__c object could not be found.)
could you please help me out with this,

Hi,
Project custom object records should only be seen by the owner of the record and users above the owner on the role hierarchy. However, for some Project records, the Training Coordinator must also have Read Only visibility to the Project record.
Create a custom picklist field on the Project object called “Priority” with the following values: High, Medium, and Low. Then create a criteria-based Sharing Rule for Project records where the Priority = High to share those records with the Training Coordinator role.
I have tried every optiona and step but still getting Challenge Not yet complete.The sharing rule did not behave as expected.Any help would be appreciated.