The problem of Ysk- is translated as follows: After opening the paper with the built-in pdf reader of Zotero, many small rectangular boxes appeared to replace the English characters such as X and Y in the original text, especially the formula part was the most missing. At first, my version was 6.0, but after updating 7.0, this problem was not solved.
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After opening the paper with the built-in pdf reader of Zotero, many small rectangular boxes appeared to replace the English characters such as X and Y in the original text, especially the formula part was the most missing. At first, my version was 6.0, but after updating 7.0, this problem was not solved.
I have the same problem.
https://s3.amazonaws.com/zotero.org/images/forums/u10426906/3aq99xpnl69rxtsx1pwq.png
https://s3.amazonaws.com/zotero.org/images/forums/u10426906/uzwifk35hoc263723rqi.png
The latter screenshot is the pdf rendered in Edge browser.