R 语言在加载PredictABEL包时报错

R 语言在加载PredictABEL包时报错，请问是什么原因，怎么解决？（MAC系统）

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
Warning message:
In system2("/usr/bin/otool", c("-L", shQuote(DSO)), stdout = TRUE) :
running command ''/usr/bin/otool' -L '/Library/Frameworks/R.framework/Resources/library/tcltk/libs//tcltk.so'' had status 1