shails

You’re absolutely right—what you’re seeing is caused by a plugin or theme (or even custom code) that is triggering output too early in the WordPress loading process, specifically before headers can be sent, which interferes with login and cookies.
This theme is triggering a WordPress translation function too early, before the proper WordPress hooks like init, which violates expected loading behavior introduced more strictly in WordPress 6.7.
If you have FTP access bypass the theme temporarily by renaming the theme and WordPress will fall back to a default theme if it will be available .

The images are not displaying because the URLs provided are either incorrect, the files have been moved or renamed, or the images have been deleted. As a result, the browser is showing the alt text instead. If you inspect the source code, you’ll see that these image links return a 404 (Not Found) error. To fix this, please double-check the image locations and reinsert them using the correct URLs or upload them again.

Hello There ,
Have you tried running the Elementor plugin in safe mode?

@tonybreadtag As rightly mentioned by @threadi the issue is indeed related to SiteGround optimizer plugin. if you will check the browser console there is an error related to the SiteGround plugin
Uncaught SyntaxError: import declarations may only appear at top level of a module siteground-optimizer-combined-js-2689d8bec10ddebd991fb9dd0a55daf7.js:55:
So you can do the following to figure out the root cause:

Turn off JS combining temporarily to confirm the root cause

• Go to SiteGround Optimizer → Frontend → JavaScript section.
• Turn OFF:
  • Combine JavaScript Files
  • Defer Render-Blocking JS
• Save settings.
• Purge all caches (SG Optimizer + any CDN + browser).
• Test the menus again.
  
  This should resolve the issue. Thanks