The first is that your login time may have expired. Generally, online banking has limited operations. It's also possible that you made a mistake. Clear your mind and check where you missed the mark. Or maybe your online banking update is not enabled.
Secondly, you have to be careful. If things like Trojans appear repeatedly, kill them quickly.
The third suggestion is that the poster activates mobile online banking and checks the consumption deduction status through text messages at all times!