when open website directl URl link Not Open

My Website has a direct URL login problem.
if I open the main URL link (https://moneygleam.com, moneygleam.com ) link automatically converts to the download of some temp file.
but if I open with another link like an article link like this article link https://moneygleam.com/bad-credit-loans-from-direct-lenders, any Category link, or 404 non-valid links it will be open smoothly there is no problem for open.
Since last week I have been trying to find out the problem and solution I am unable to find out.
I attached it here for reference.
when I try to check the main page speed it will show data errors. but if I open the wp-dashboard with the login link it will open that’s the reason I am unable my website page speed, other errors, and unable to open the website home page with website main URL link.

References

https://app.screencast.com/YB8DFOo6ROnF0

https://app.screencast.com/Wc2GFrCZMPpHJ

https://app.screencast.com/XBjKiAI2VtWRW

Screen Record One

Screen Record Two

Try resaving your permamlinks; double check your WordPress settings for which page to load as home page.