During the install of the app on Linuw, if the /opt folder does not exist, the error message is not correct.
Fixed in: https://github.com/arnobl/latexdraw/commit/3f64346017c22f8206cd544053d7e4c18b0b3630
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Fixed in: /github. com/arnobl/ latexdraw/ commit/ 3f64346017c22f8 206cd544053d7e4 c18b0b3630
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