Hello gennal,
Thank you for using Apple Support Communities and thank you for sharing this screenshot with us. If your iCloud Photos are not loading on your device, we would like to recommend some steps to help isolate this issue. Follow these steps below:
1.) Turn off Low Power Mode. This feature can interfere with iCloud Photos loading: Use Low Power Mode - Apple Support
2.) Switch and test this issue under a different Wi-Fi network.
3.) Install any pending updates that might be available. Updates include various fixes: Update your iPhone or iPad - Apple Support
If these issue continues to occur and if the iCloud website also doesn't load your photos, please reach out to Apple Support. They might have to investigate this issue further with you. Use this link to reach them: Get Support
Thank you for using Apple Support Communities. Take care.