I didn’t created HTML Blocks at all that are provided by theme. you said create block through the elementor ,but Elementor giving an error. So, how I can change.???

1. I can not able to update the text of Promo popup through the HTML Blocks.

• When I tried to update text with wordpress editor at that time some content remove automatically.
• when I want to update with elementor on the promo popup at that time Elementor giving this Error.
  “Sorry, the content area was not found on your page.
  You have to call the ‘the_content’ function in the current template for Elementor to work on this page.”

2. please add dummy image for shipping method in single product page. Elementor is not working in any HTML block

Please take a look on my website I am not able to update the content as I want. I am phasing this issue till last week. This site is live now. I need urgent help.