The 3Dmax file was created using Instance mode, material maps are also in Instance. When converting to Edit Poly, change the Corona UVW map randomizer and Corona MultiMap settings from Instance to Mesh Elements.

3D Gypsum Panel in DEKO LINE coating (Deco Line) M-36 350x150x25mm
Main material: Gypsum
Quantity per package (pcs): 10

Link to the manufacturer: https://decoline.org/ 
Link Leroy tree: https://ekaterinburg.leroymerlin.ru/product/3d-gipsovaya-panel-v-pokrytii-deko-layn-lp236-350x150x25mm-037m-10sht-93807465/?utm_referrer=https%3A%2F%2Fvk  .com%2F
Link Leroy white: https://ekaterinburg.leroymerlin.ru/product/3d-gipsovaya-panel-deko-layn-lm236-350x150x25mm-037m-10sht-93806985/ 

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured with PBR in mind.