ارور عجیب در هدر سایتها

سلام
چند روز در هدر سایت های جوملایی یا مامبویی حتی ارور عجیبی ظاهر میشه برای شما هم این مشکل پیش آمده؟

برای نمونه این دو سایت را ملاجظه کنید : [مهمان/کاربر گرامی برای دیدن لینک ها ابتدا باید عضو سایت شوید و لاگین کنید برای ثبت نام اینجا کلیک کنید]
[مهمان/کاربر گرامی برای دیدن لینک ها ابتدا باید عضو سایت شوید و لاگین کنید برای ثبت نام اینجا کلیک کنید]
هر سایت روی یک سرور مجزا هستند و هاستشون با هم فرق میکنه هیچ افزونه ای یا تغییر هم اعمال نشده است...

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