Browser Tab Name Incorrect (og:title?)

Hello, sorry if this has been asked I tried searching but honestly I have no idea what I’m looking for. I’m even unsure how to ask the question. so here goes.

The browser tab on certain pages of my site are showing part of my 404 page error message but the page exist and displays correctly. It’s pages like user login and account signup where there is no individual page for me to update the Yoast SEO settings directly. (which I’m assuming is the problem possibly?).

Does anybody have any ideas on how to update these pages to reflect the correct wording in the browser tab?

Would really appreciate any assistance.

Cheers
snippet from view page source….

<title>Whoops a daisy this page doesn't appear to exist!</title>    <meta name='robots' content='noindex, follow' />

	<!-- This site is optimized with the Yoast SEO plugin v19.0 - https://yoast.com/wordpress/plugins/seo/ -->
	<meta property="og:locale" content="en_US" />
	<meta property="og:title" content="Whoops a daisy this page doesn't appear to exist!" />