It is a common problem that WeChat enterprise group chat messages cannot be sent or received, which may be due to network reasons or that someone is forbidden to talk in group chat. You can try to check the forbidden word settings in the group, see if anyone is forbidden or cancel all forbidden words, and then send a message to everyone in the group to confirm whether you can send and receive messages normally. If not, you can try logging in again. If not, you can try to dissolve the whole enterprise group and re-form.