ekscentrysytet

I’m using Contact form 7 in network on every site and recently this blank page error started to appear on different sites under my network in sequence causing site crashes. Right now it is on my three sites.

{"mailSent":false,"into":"#wpcf7-f8-o2","captcha":null,"message":"\u041e\u0448\u0438\u0431\u043a\u0438 \u0437\u0430\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f. \u041f\u043e\u0436\u0430\u043b\u0443\u0439\u0441\u0442\u0430, \u043f\u0440\u043e\u0432\u0435\u0440\u044c\u0442\u0435 \u0432\u0441\u0435 \u043f\u043e\u043b\u044f \u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u044c\u0442\u0435 \u0441\u043d\u043e\u0432\u0430.","invalids":[{"into":"span.wpcf7-form-control-wrap.name","message":"\u041f\u043e\u0436\u0430\u043b\u0443\u0439\u0441\u0442\u0430, \u0437\u0430\u043f\u043e\u043b\u043d\u0438\u0442\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043f\u043e\u043b\u0435.","idref":null},{"into":"span.wpcf7-form-control-wrap.phone","message":"\u041f\u043e\u0436\u0430\u043b\u0443\u0439\u0441\u0442\u0430, \u0437\u0430\u043f\u043e\u043b\u043d\u0438\u0442\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043f\u043e\u043b\u0435.","idref":null}]}

What is the problem?