Sometimes a document hasn’t been uploaded properly. This could mean some of the text isn’t correctly displayed or there might be some tables or figures that are corrupted or are overlapping the text in the document. In short, the document isn’t readable.
Have you bought such an item? Try to contact the seller at first and ask if he/she can send you the correct document and replace the document that is currently uploaded on Stuvia. If this does not help, please send us an email at email@example.com