image doesn't show

I just downloaded the plugin and have the same problem as someone who posted here about 10 months ago.

I set up a WP gallery on a page and another page with wp-greet shortcode.

The wp-greet page shows up on settings as the form page and I clicked active on the gallery in the settings.

When I display the gallery page and select a photo it displays the form but the photo is not above it only the name of the photo I selected.

When I open the developer tools in Chrome I see the following for the photo

http://mysite.com/greeting-card/?gallery=151&image=http://mysite.com/greeting-card/photo/

which displays the name but not the photograph.

I tried to add new photos to the gallery as indicated on that previous issue but the photos still do not display.

https://ww.wp.xz.cn/plugins/wp-greet/