This worked for me...
If you are using windows...
Search 'cmd' in the windows search bar.
Enter this:C:\xampp\apache\bin\httpd.exe
Find which file and which line the error occurred.
For example, mine was in the file below on line 37.
httpd-multilang-errordoc.conf
Open the code and fix the error by either removing the line or fixing it.
Done! I should work now.
:)