"Unable to render" issue when using 'Include Page Macro'

[John Phillipp Esguerra]

I am currently testing these links
https://confluence.atlassian.com/doc/include-page-macro-139514.html
https://community.atlassian.com/t5/Confluence-questions/How-can-i-put-the-content-of-one-confluence-page-into-another/qaq-p/211858
https://community.atlassian.com/t5/Confluence-questions/One-Confluence-page-in-two-places/qaq-p/63261

Here is the scenario:

1. Source page is from space 1

2. Pasted the page from space 1 to space 2 using "page include" option

3. Created a guest account to view space 2

4. Guest trying to view the page I created in space 2

5. Guest getting "Unable to render {include} The included page could not be found"

[john_ristevski]

Did you find a solution to this? I am struggling with the same problem