Ctex in the r markdown problem

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This is a duplicate of this one

Ctex in r markdown problem

hi guys, i have met a problem and i need your help desperately! when i open a r markdown under the ctex, i could get the result in the form of pdf. it just couldn't work it out. the specific error is as follows it says 'mismatched latex support files detected loading "expl3.sty" aborted the L3 programming layer in the latex format.......' and there is also a warning message as follows warning message: in has_crop_tools( ): tool(s) not installed or not in PATH:ghostcrip as a result, figure cropping will be disabled it has already bother me for a really long time. and i don't know how to deal with that. thank you guys!