HTTP Status code: 500 was returned. Internal Server Error

It could be a number of things. Check out this article, it may help you: How to Fix the Internal Server Error in WordPress

Wait, when you say it was connected to your mobile app, do you mean the WordPress app for mobile or something else? I can see the site fine. Is this an admin dashboard only thing?

Thank you for your help. If I am on the computer can see my site but I can’t login because I get that message and when I try to do it from the mobile app, I get the same thing

Can you check and let me know if there is .htaccess file in the same folder where you installed WordPress.

If the .htaccess file is there the please share the list of plugins that you have installed on the site.

BTW I can see the page at https://iblog.dearbornschools.org/msreda/wp-login.php. Do you see it and you get the error when you supply the credentials and try to login?