What is this error all zero-area slot sizes were removed?

slot > slot name=name>permalink Named slots allow consumers to target specific areas They can also have fallback content !-- --> div>

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area slot auto Homogeneous and pinhole-free large-area perovskite films are required to realize the commercialization of perovskite modules and panels

area789 ฝาก10รับ100 : the area on a hockey rink in front of the crease and between the face-off circles 2 : a place or position in an organization, arrangement