When saving, you chose to save as a web page, so a plain text web page file and a folder for storing pictures will appear. In addition, once you delete the folder or any files in it, you will not find these pictures when you open it again. Therefore, the inserted picture cannot be displayed. When choosing to save, be sure to read the saved format clearly, and then save after choosing.

Or you can choose to save it as a single file web page *. Mht format, and the pictures will be embedded in a file, so there will be no more folders.