Pictures added to diary activity not showing

Expected behavior

I was expecting to see previews or thumbnails of the pics in the respective activity I added a pics to.

Actual behavior

I couldn't see any pics or thumbnails, all I got was a plain white background in place of the pics.

How to reproduce

Download activity diary on fdroid (latest version is 1.1.1).
Select an activity such as gardening.
Click the camera icon to add a pics to the activity.
Now check the activity on the main page, you'd see white background rather than pictures.
Also check the diary submenu, still the same view under the activity.

• App: Activitydiary app for Android
• Operating system:

Android Lollipop 5.1 tablet & Nougat 7.0 tecno k7.

Recording Of The Bug