Fatal Error When Installing the "hypeUI" Theme

Anyone know the problem? when I activate the plugin / theme and I refresh the page, an error warning pops up. But when I open the "Incognito Tab" on Chrome and open my website it looks normal "and can be said that the" hypeUI "theme works. but after user login / admin will return the error again. for more details, please click the link below to see the picture

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