Check Safari extensions, or try removing cookies, cache, and other website data if a webpage or site doesn't load on your Mac.
Some Safari extensions that block ads or other website content can prevent some page elements from displaying. You can temporarily turn off extensions, then re-load the page to see if this is the issue.
Choose Safari > Preferences.
Select an extension, then deselect the checkbox "Enable… extension." Repeat this step for every extension that's currently installed.
Reload the page by choosing Choose View > Reload in Safari. If the webpage loads correctly, one or more extensions was blocking the content from loading. Re-enable an extension, then reload the page again to determine which extension is blocking the content you want to view.