handler for x-httpd-ea-php56 returns invalid result code 70007

hello All, I am having challenges resolving this persistent 500 internal error that shows up while submitting a POST upload file data of about. Upon checking the error_log on /usr/local/apache/logs all I see is handler for application/x-httpd-ea-php56 returned invalid result code 70007 I just need to know exactly what the issue is through a precise error message and not something vague. It is important to state that I have tweaked php ini config such as: max_execution_time, max_input_time, memory_limit, post_max_size, upload_max_filesize But still whenever a file of about 10MB is uploaded, I get the 500 error and log states nothing else except this: handler for application/x-httpd-ea-php56 returned invalid result code 70007