Image not showing up in pop-up in web map

[EninnaLuli1]

I am creating a web map with locations which have pictures attached to them. I have a CSV file with the locations and their thumbnail url and regular-sized photo url, which I took from Flickr. They are shared publicly. I created a shapefile from the CSV file and then added to a web map. I followed this link to customize the pop-ups to show the thumbnail image:

Tips for displaying photos in pop-ups | ArcGIS Blog

But my thumbnail shows up like this (when I click on it, it directs me to the the regular-sized photo in Flickr).

I am not sure why the thumbnail image does not show up.

[AdrianWelsh]

Eninna,

The photo url has to have a photo extension on it (like .jpg). If you post a link to the Flickr photo page for that photo, it will not show up in the popup.

Can you post the link to the photo you are trying to share?

[EninnaLuli1]

This is the link:

1151,1152 and 1156 | Flickr - Photo Sharing!

How can I get it to have a photo extension?

[AdrianWelsh · Accepted solution]

Hi Eninna,

Follow the directions here:

Get the URL of a Flickr photo | Yahoo Help - SLN15714

1. Click on the photo you want to share to open it.
2. Click the Download icon.
3. Click View all sizes.
4. Select the size of photo you want.
5. Right-click the image | select Copy image URL.

[АртурМухаметзянов · Accepted solution]

Hello!

I have a similar problem, but it is more likely due to a lack of understanding of how to set different URLs for different lines.
There are more than 900 positions in my table, each of which needs its own photo, I have my own photos, but even by setting test URLs I was only able to set one image for all rows. How to make pictures individual?
How can I download them from my computer?
This is ArcGIS Pro 

Thank you very much..