I'm using Tapatalk without any issues. My version is Tapatalk version 7.2.8 on an iPad and iPhone. This is from three months ago and is the latest version as far as I know. I don't know if it would be the same for an Android platform.
A couple of measures you could explore are to clear your caches and then reinstall the Tapatalk App. Clear caches by 1) Settings, then go to Safari (or whatever mobile browser you're using), then scroll down to 'Clear History and Website Data' or some such similar wording, click on it and then clear; 2) I also clear browsing history in Google by clicking the little screen or book looking icon at the bottom of the screen. You can clear all those browsing pages by quickly flicking them to the top of the screen. These are two actions I do at least every day.
If these actions don't solve the picture loading problem, you may want to sign into the Tapatalk forum and ask for help there. Look at my profile and you'll see the Tapatalk forum there. Start following the 'Tapatalk Mobile' thread for iOS andAndroid App Discussions. Ask the member, "Howdy" for help.