first my english is bad
step fixe this problem
1- go to lazarus>package>install/uninstall package
2- in left filter write pas2js
3- uninstall selection
4- save and rebuild IDE
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5- go to Fpcupdeluxe
6- in box module selecte pas2js-rtl
7- uninstall
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8-go to lazarus>tools>configour "build lazarus"
9- in profile to build selecte clean up + build all
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10- go to Fpcupdeluxe click on install/update FCP+LAZ
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Enjoy