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This thread is resolved. Here is a description of the problem and solution.

Problem:
The client is experiencing an issue with registering their WPML plugin after moving their website to a new hosting provider. They receive an error message stating 'Connection failed! Please refresh the page and try again. (Unable to register: Site key not matching)'.
Solution:
If you're encountering a similar issue, we recommend the following steps to resolve it:
1. Log in to your WPML.org account and navigate to the Sites page.
2. Delete the existing site key.
3. Log in to your site, go to the Dashboard >> Plugins >> Add new plugin > Commercial tab and click the Unregister WPML from this site link if it exists.
4. Click the Register WPML link.
5. Click the Get a key for this site link to generate a new key.
6. Copy the new key, paste it into the input box on your site, and press the Register button.
If the issue persists, try the following additional step:
- Go to WP Dashboard Menu >> Updates and press the "Check again" link.

Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem continues, please open a new support ticket.

This is the technical support forum for WPML - the multilingual WordPress plugin.

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Last updated by Mihai Apetrei 5 months ago.

Assisted by: Mihai Apetrei.

Author Posts
February 11, 2025 at 5:33 am #16689918

maurizioM-27

Background of the issue:
I have licenses for WPML and have moved my website to a new hosting provider. I am trying to register the site but encounter an issue. The issue can be seen at: hidden link

Symptoms:
I receive the error message: 'Connection failed! Please refresh the page and try again. (Unable to register: Site key not matching)'.

Questions:
Why is the site key not matching after moving to a new hosting provider?
How can I resolve the 'Connection failed' error to register my site?

February 11, 2025 at 2:00 pm #16692026

Mihai Apetrei
WPML Supporter since 03/2018

Languages: English (English )

Timezone: Europe/Bucharest (GMT+03:00)

Hi there, and thank you for contacting WPML Support.

This issue usually happens when the site URL and registered site URL are different, e.g., with www or without www. Could you please delete the existing site key and create a new one by following the below steps:

1. Please login to your WPML.org account >> Go to the Sites page: https://wpml.org/account/sites/
2. Delete the existing site key.
3. Please login to your site and go to the Dashboard >> Plugins >> Add new plugin > Commercial tab and click the Unregister WPML from this site link if that link exists.
4. Then please click the Register WPML link.
5. Click the Get a key for this site link.
6. It will generate the Key for your site.
7. Copy the key, paste it back into the input box, and press the Register button.

If the notifications still persist, please try the below procedure:
1. Go to WP Dashboard Menu >> Updates.
2. Press the "Check again" link and see if this resolves the issue.

Kindly let me know the results.

Mihai Apetrei