I can't login into my own www.remarpro.com blog

https://wellbehavedchild.com/wordpress/wp-admin

Thank you so much!

Hello Rev. Voodoo, I’ve made some changes to my blog, https://wellbehavedchild.com/wordpress. and this now comes up.”
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Apologies, but no results were found for the requested archive. Perhaps searching will help find a related post”
I’m new to WordPress and still learning how to use this blogging platform so please bear with me.
The funny thing is I have created the post and can’t work out why it is now doing this. Any help would be gratefully appreciated.

What changes did you make?

Thanks for taking the time to help.I’ve just added new a custom header and got rid off an old post and replaced it with a new post to bring my blog up to date.

Did you PUBLISH the new post or is it saved as draft?

It’s saved as draft

Its saves as a draft. Ignore the last post