If you are facing this issue as topic heading says then this issue is not so common and arises due to some wrong configuration in .ini file.
Now to resolve this issue you can do it through php.ini or .user.ini file.
What you have to do is add this code:
Login to WHM >> "Mutli PHP INI Editor" >> select php version in editor mode and search for "zlib.output_compression" and set it as:
Now to resolve this issue you can do it through php.ini or .user.ini file.
What you have to do is add this code:
OR you can do it through WHMoutput_handler = Off
zlib.output_compression = On
zlib.output_handler = ob_gzhandler
Login to WHM >> "Mutli PHP INI Editor" >> select php version in editor mode and search for "zlib.output_compression" and set it as:
zlib.output_compression = On