V4.8 cannot send email (REST API enabled)

Can you tell us what the requested URL is?

hello Takayuki san,
sorry for the late reply, I forgot to check for follow-up notifications.

using Contact Form 7 V4.7, an AJAX call is made to https://jewelry.rin-kg.com/contacts/ and emails are sent successfully.

using Contact Form 7 V4.8, there is first a POST to :
https://jewelry.rin-kg.com/wp-json/contact-form-7/v1/contact-forms/3498/feedback
that triggers a 301 response followed by a GET to the same URL that generate a 404 and this Response:
code “rest_no_route”
message “No route was found matching the URL and request method”
data Object
status 404

thank you for your attention.

Thanks. What other plugins and theme do you use?

the theme is self made.

plugins quite a long list:
Advanced Custom Fields PRO
All In One WP Security
BBQ Pro
Contact Form 7
Disable Embeds
Disable Emojis
EWWW Image Optimizer
Hyper Cache
Media File Renamer
Menu Item Custom Fields
Regenerate Thumbnails
Simple Image Sizes
Simply Show IDs
WP Media folder
WP Media Folder for Lightroom
WP/LR Sync
WPML Multilingual CMS
WPML Translation Management

Where did you get these plugins from?

All In One WP Security
BBQ Pro
Disable Embeds
Disable Emojis

All In One WP Security:
https://www.ads-software.com/plugins/all-in-one-wp-security-and-firewall/

BBQ Pro:
https://plugin-planet.com/bbq-pro/

Disable Embeds:
https://www.ads-software.com/plugins/disable-embeds/

Disable Emojis:
https://www.ads-software.com/plugins/disable-emojis/

OK. First try deactivating All In One WP Security and BBQ Pro. If the issue still remains, try deactivating all other plugins than Contact Form 7 and switching to the default theme.

After all day debugging, googling and learning about wp rest API, I figured out where the issue was…

I have a rewrite rule in my .htaccess to add a trailing slash to URLs, this is what was causing the 301 redirects

I added a line to exclude /wp-json and now the plugin works just as expected.

thank you for your time and support.

Best regards.

That’s good to know. Could you tell us for reference about the rewrite rule that was causing redirect? Because I think it will help other users.

absolutely!

in .htaccess I had:
RewriteCond %{REQUEST_URI} /+[^\.]+$
RewriteRule ^(.+[^/])$ %{REQUEST_URI}/ [R=301,L]

I had to add two lines (one each language in the website) and the rule now looks like this:
RewriteCond %{REQUEST_URI} /+[^\.]+$
RewriteCond %{REQUEST_URI} !^/wp-json
RewriteCond %{REQUEST_URI} !^/en/wp-json
RewriteRule ^(.+[^/])$ %{REQUEST_URI}/ [R=301,L]