If elements on the page doesn't appear, performing a hard reload often solves this issue.
Press the following shortcut to perform a hard reload of the page:
Hold CTRL + SHIFT
Hold CMD + SHIFT
If this didn't solve your issue, as an alternative you could try this (supported by most browsers):
1. Right-click somewhere on the page, then select "inspect" at the bottom of the list:
2. Right-click the reload icon at the top left side of your browser (directly to the left of the URL field). Then press "Empty Cache and Hard Reload".