Error 400 in browser

This is brand new installation using Twenty Fifteen theme.

All is well – font looks good (‘Trebuchet MS’) but Chrome shows an error 400 which goes away when I disable the plugin.

How can I clear this error?

GET https://fonts.googleapis.com/css?family=%3A&subset=latin%2Call&ver=09f8b1e0039b66eb57cc636d1f06ea79 net::ERR_ABORTED 400
(index):39
jquery-migrate.min.js?ver=1.4.1:2 JQMIGRATE: Migrate is installed, version 1.4.1

what is highlighted is
<link rel=’stylesheet’ id=’tt-easy-google-fonts-css’ href=’https://fonts.googleapis.com/css?family=%3A&subset=latin%2Call&ver=09f8b1e0039b66eb57cc636d1f06ea79&#8242; type=’text/css’ media=’all’ />

(I’m not getting it on other websites using Easy Google Fonts)

Thanks

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