In some cases, you will see a line called Line-based text data: text/html under the HTTP line in the packet details pane. It is shown in the following screenshot:
Figure 12.7: HTTP error and explanation
You will see the line-based text data right beneath to the HTTP line in the packet details pane (marked as 1 in the preceding screenshot). Below this, you will see some explanations (marked as 2 and 3 in the preceding screenshot) for what could be the reason for the error.