Hi Stas,
In this case you need to increase the PHP variables: memory_limit, max_execute_time and max_filesize_upload
- memory_limit: In case you upload big size picture, the system will need more CPU to resize it, and in this case, it need enough big memory to process this task. Solution is increasing memory_limit as much as possible
- max_execute_time: When system works with big size picture, it will need more time than smaller one, so we must allow enough executing time so system can complete work.
- max_filesize_upload: when you upload the big picture that exceed the maximum file size limited value, the system won't allow to upload it into server. In this case, to make sure the picture can be uploaded, you need to select the photo that has size (kb) is lower than the max_filesize_upload value.
Thanks
Dam