Preview could not load due to iframe response (only on one page)

[macvink]

Hello. On one page in my site cornerstone does not load properly. On other pages it loads fine.

I have already checked the php-version (latest) and tried upgrading memory. Still problems. What can I try further to fix this?

[tristup]

Hi @macvink,

Thanks for reaching out.

After checking the page, I found that the issue is caused by the second section named Onderwijsassistenten . I replicated the content on a separate page and removed that section, and the page loaded correctly. This suggests that the problem is likely due to broken HTML or problematic content within that section.

I recommend deleting the Rows in that specific section one by one until the issue is resolved. The last one you remove should indicate which part contains the broken HTML or invalid content. I also saved the content as a Template and used it on a test page, and confirmed that the final section is the source of the problem.

Please review the content in that section and check for any broken tags or malformed HTML.
Kindly note that content-related issues fall outside the scope of Theme Support .

Thanks

[macvink]

Thanks! I will check the rows row for row.

[tristup]

Hi @macvink,

Please let us know if you need any further help with this.

Thanks

[macvink]

I have now managed to make it work. The preview is back again.
One new problem pups up:
Now the inspector in the side bar says for every element: “undefined”. Example:

[tristup]

Hi @macvink,

It seems that the Classic Elements are not enabled, but after enabling them, it starts showing again.

Thanks