The reasons why the food source applet can't be opened are: 1, too many WeChat caches; 2. WeChat has not been updated to the latest version; 3. The applet operator has stopped the service of this applet; 4. Your own network is not good and you can't connect; 5, did not give the applet the necessary permissions. The specific solutions are as follows:

1. You have too many WeChat caches. It is recommended to clean up through My Settings Storage Space.

2. WeChat has not been updated to the latest version, and the version of WeChat sometimes affects the opening of applets. It is recommended to update the latest version.

The operator of the applet you are using has stopped the service of this applet, or there is something wrong with the applet system itself. In this case, no one can open this applet.

4. It may be because of your personal connections. You can try to reconnect to the network. Or there are too many programs running on the phone at the same time. It is recommended to close several programs running in the background and try again.

5. Generally, small programs will allow access to the user's geographic location permissions and personal nickname avatar information. It is possible that the first time I went in, I accidentally made a mistake and didn't allow it, which made it impossible to get in.