7110d3f6-de7c-47d0-880e-fe7b1cddd624

This behavior likely stems from the way the website handles referrer headers or URL structure validation. Here's why it happens and how it might be resolved:

Possible Causes

1. Referrer Header Requirement
   - Some websites use the HTTP "Referrer" header to verify where a visitor is coming from. If the referrer is empty or doesn't match certain criteria, the server might reject the request and show a generic error message like "Oops, page not found!"
   - When you copy-paste the URL into the address bar, there’s no referrer header, which could trigger this error.
   - Clicking a link, however, sends the referrer header from the originating page, allowing the site to validate the request and load the content properly.

2. Anti-Scraping Mechanism
   - The website might have an anti-scraping mechanism that intentionally blocks requests made without a valid referrer, treating them as suspicious.

3. Dynamic URL Generation
   - The website may generate temporary or session-based URLs that rely on hidden parameters or cookies. Copying and pasting a link directly may lose these parameters, causing the server to reject the request.

4. Canonical Redirect Issues
   - The site may use canonical or redirect rules to enforce specific URL formats, but these rules may not handle direct input from the address bar correctly.
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How to Fix This

For users:
1. Use Bookmarking Instead of Copy-Paste
   - If you need to revisit pages frequently, bookmark them instead of copying and pasting the URL into the address bar.

2. Use the "Open Link in New Tab" Option
   - This ensures the referrer header is passed along when opening the page.

3. Try Disabling Browser Extensions
   - Certain extensions (e.g., privacy tools) block the referrer header or modify it. Disabling them temporarily can help troubleshoot the issue.

For web developers of the site:
1. Relax Referrer Validation
   - Adjust server-side rules to allow requests without referrer headers or from direct navigation.

2. Ensure URL Consistency
   - Avoid relying on dynamic or session-based URLs for pages that should be publicly accessible.

3. Log and Debug
   - Analyze server logs to identify why requests without referrers are being rejected. Use this data to refine validation logic.

4. Fix Anti-Scraping Logic
   - If anti-scraping measures are the cause, consider implementing CAPTCHAs or rate-limiting instead of outright blocking requests without referrers.
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Why Tools Like the Wayback Machine Fail
The Wayback Machine and similar tools typically crawl pages without a referrer header or session cookies. If the website depends on these elements, such tools will capture the error page instead of the actual content.

To fix this, the site developers could whitelist certain bots (like the Wayback Machine's user agent) or implement less restrictive referrer-based checks.