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.
You need to add an additional line for this, which set the limit to 2MB.
Restart your apache, and you’re done.