The spellcheck option in ckeditor is throwing this error when use is attempted. Once the error window appears the screen just freezes unless you go into another menu. I am unsure if the recent update has contributed to this issue.

Wordpress 4.9.4 CiviCRM 4.7.29

Error Message: "WebSpellChecker.net server: The specified customer ID is intended for use with CKEditor only. For more information, please contact us at [email protected] or submit a ticket at webspellchecker.net website."

1 Answer 1


I had the same, in both Chrome and Firefox, due to the Referrer-Policy setting of my site. Error was raised with Referrer-Policy: same-origin (or stricter). To resolve it, relax the policy to origin-when-cross-origin for CK Editor.

Apparently, webspellchecker uses the referrer to check if the originating page is CK Editor.

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