Cannot Access Development Location

I’m hoping someone can help me figure this out. I have set up a WordPress site in a temporary development location at https://bluesarthouse.com/oasisfoodpantry/. I can access it from my network but everyone outside my network is getting 404 errors. I have checked all my permissions, rewritten my .htaccess file, reset my permalinks. I cannot figure out what is wrong and it’s driving me crazy. Help please?