The file is not compilable in overleaf
Download the project as a zip file and upload it on overleaf. Then try to compile. Here is the error you would get.
Emergency stop.
<*> macros.tex
*** (job aborted, no legal \end found)
Here is how much of TeX's memory you used: 8234 strings out of 492990 122577 string characters out of 6132621 209633 words of memory out of 5000000 11686 multiletter control sequences out of 15000+600000 4702 words of font info for 16 fonts, out of 8000000 for 9000 1141 hyphenation exceptions out of 8191 42i,0n,40p,344b,39s stack positions out of 5000i,500n,10000p,200000b,80000s ! ==> Fatal error occurred, no output PDF file produced!