X-1FBO may be tagged as an advertisement site and if your browser has ad-blocks, there is a chance you will see this at some point:
How to Fix:
Turn off the ad blocker
You can change your settings to allow ads on all sites.
At the top right, click on the 3 vertical dots > Settings.
Click Privacy and security > Site Settings.
Click Additional content settings > Ads.
Turn off Block ads on sites that show intrusive or misleading ads
Allow ads on specific sites (recommended for X-1)
If you trust a site, you can add an exception to allow ads on that site.