Missing textboxes of css, scripting, content in markdown in website module of erpnext

ERPNext
1

I was adding some codes and now I can’t find textbox area of css, scripting, content under markdown, table content in section with tabs in website module of erpnext. tried to inspect it and made change to display:block in html editor in chrome. But code is not visible. Now I’m not able to add any content or make any css , javascript changes in the website module.
This has affected at site level. Nowhere the css, scripting textarea, content is seen nor the code is visible.

markdown
markdown700×430 11.7 KB

scripting
scripting1045×354 20.4 KB

sectionwithtabs
sectionwithtabs698×649 29.5 KB

style
style1045×337 10 KB

website
website1310×387 30.1 KB

please help.
I have attached the images for your reference.

2

Remove your changes if added, migrate the site, and build the app.

3

Can’t find where the error is. after changing the css and js code many times, it is not possible to figure out where the problem is. In fact, the html, css and java code isn’t visible anywhere in website module for any page.