1. Account problem: If your WeChat account is abnormal, such as blocked or stolen, you may not be able to view the history. At this time, you can try to contact WeChat customer service to solve the account problem.

2. Version problem: If your version of WeChat is too low, there may be a problem that you can't view history. At this point, you can try to update the WeChat version or uninstall and reinstall the latest version of WeChat.

3. Permission setting: If the permission setting of your WeChat account is incorrect, you may not be able to view the history. At this point, you can try to enter the WeChat Settings page to view and modify the related permission settings.

4. Network problem: If your mobile phone network is unstable, you may not be able to view the history. At this point, you can try to switch the network environment or reconnect the network.