Ash here from the Shopify team. Welcome to the Shopify Community!
Thank you for posting a screenshot to help explain the issue you're currently facing. I see your shops custom domain in that screenshot, so I went ahead and tested it from my end as well. When I go to visit www.essenza.ng, I appear to be able to load up your website without any issues. This tells me that there may be some sort of temporary issue at play, or perhaps a localized issue which we should be able to resolve via some troubleshooting steps. Could you please try the following and reply back here to let me know the results?
If you continue to experience the same issue, please let me know so we can take a closer look into this together.