Postman does not work properly after authorization

I have begun the module:

I followed instructions down to setting the environment variables:

Then, authorization was updated:

Get New Access Token is successful.

Use Token clicked

Then, to test, I went:  Cognite API collection > "Assets" folder > "List assets" > Send

This gives Error:

So, I deselect “minCreatedTime” parameter. (THERE IS NOTHING in the documentation that talks about this.)

The, press “Send” again.

But then get this error when testing:

So, deselect  “maxCreatedTime” , and progressively deselect minLastUpdatedTime; maxLastUpdatedTime as indicated by error messages.

Finally, 

Gives the error:

Therefore, my attempt to list the assets in the CDF project has failed.

Next, I try to list the timeseries data: timeseries > list time series > Send

Try deselecting all the query parameters > Send

This time there is a listing of timeseries:

My questions:

Q1. Why can I not list assets?

Q2. Why can I list timeseries, but not assets?

Thank you for your support.

Regards,

Doug