• I am suddenly getting spell check errors that generate the following message: “Error response: <!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>&#8221;

    They occur consistently on some of my sites, but not at all on others. I have sites on 3 different servers, and on each server some but not all sites display the error.

    There is no consistency in terms of the themes used and I have not yet identified a common plugin which might be the cause.

    Any suggestions gratefully received.

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