While uploading any img/pdf  in MB's I have facing this issue in pop up. I have increase all these parameters in php.ini (apache server)i.e

1.  session.gc_maxlifetime  =1440

2. upload_max_filesize = 400M

3.post_max_size =400M

4.max_execution_time =30

5.memory_limit =256M

6.max_input_time =60

 

but still problem remains same.

 

 

This would indicate an error on your server processing the image upload. Please contact your hosting provider for assistance in troubleshooting the error. There likely will be more information about what is happening in your server error logs that they can help you correct.