This error message appears today, and it seems related to fcgi.

As defined here, http://httpd.apache.org/mod_fcgid/mod/mod_fcgid.html#fcgidmaxrequestlen, the default value for MaxRequestLen is 131072, which is quite low for most implementation. I would prefer to use a higher value for this.

For cpanel users, the configurations lies in this file.
/usr/local/apache/conf/php.conf

You need to add an additional line for this, which set the limit to 2MB.
MaxRequestLen 2097152

Restart your apache, and you’re done.