d9d9_Sun

It seems, I’ve got it.

I’ve opened /wp-content/plugins/responsive-lightbox/includes/class-frontend.php:503, and saw that in line above (line 497) there is word “field” (not “fields“). But in line 503 I saw “fields”.
So. I’ve just changed “field” to “fields” in line 497.

Original line 497:
foreach ( $duplicates as $field_id => $field ) {

My line 497:
foreach ( $duplicates as $field_id => $fields ) {

Profit!

• This reply was modified 5 years, 2 months ago by d9d9_Sun.
• This reply was modified 5 years, 2 months ago by d9d9_Sun.

I had the same problem.

So I made research. And here what I found.

At my website I disabled rest api one day.

And now I have error with Caldera forms – Unexpected token < JSON at position 0. It’s because wp-json is disabled.

So here what you must do.

Delete plugin or code (at functions.php) that disabled rest api. Then press “Save” at Settings-Permalinks. Now form will be sent.