I have a problem on my wordpress website. I made few changes in website recently and after that I realized that H1 tag on website is appearing like:

<header id="masthead" class="site-header" role="banner"><div class="container"> <div class="site-branding"> <h1 class="site-title"><a href="https://www.theseoguy.in/" rel="home"> <a href="https://www.theseoguy.in/" class="custom-logo-link" rel="home" aria-current="page"><img width="200" height="104" src="https://www.theseoguy.in/wp-content/uploads/2018/09/cropped-Sample-3-copy.png" class="custom-logo" alt="Logo" decoding="async" /></a> </a></h1>
When I tested this, H1 is not appearing as page title on different tools. It is appearing blank. How do I solve this? Also I saw that a line is appearing on every page content automatially which I have not added in backend. I am trying to find the source from where it is generating and appearing on every pages.

I tested few things and found that whenever I add an enter
then this line appears automatically.

I tried finding out the additional CSS, default stylesheet, theme customizer and widgets.