Direct URLs stopped working

[UmeshKU539]

We have a docsify documentation website and direct URL (full path to source files) to the different pages stopped working suddenly. We are getting a The requested URL was not found on this server error message.
However, when we go to main URL and navigating to these pages from side bar will load the website.
Note: We disabled URL hashing due to some project specific reason. So these direct URL works if we add the # manually. Is there any way to fix this issue without enabling the URL hashing.
Thanks in advance.