There are few things you need to check out in order to show the texture on the model:
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Press 6 to show the textures on objects. It's a default key used for this procedure.
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Check the source images folder in the project directory and make sure the textures are there.
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Turn off Use Default Material in Shading menu for the view port.
One of this procedure should restore the complete view of textures for your current opened model.