1, the interface is not displayed due to network congestion;
2. The WeChat version is too low;
3. There is a problem with the interface between ICBC and WeChat;
4. Server communication delay. These are the reasons why ICBC can't generate signatures from WeChat.
If the online banking user prompts "Signature failed, please confirm the signature control, the root certificate has been imported", this is a problem in installing the online banking control, please reinstall the online banking control.
If the online banking login prompts "Signature failed, please confirm that the signature control/root certificate has been imported into the browser", or the password can't be entered in the password box, the problem is caused by the online banking control not being installed or the installation is invalid.