If the import fails and does not respond after a few minutes, or it announces that “ Import failed”, your PHP configuration limits too low to complete the process. Please contact your Web host and ask them to increase those limits follow this minimum:
- max_execution_time 300
- memory_limit 128M
- post_max_size 32M
- upload_max_filesize 32M
You can take a look in our article Theme Requirements to have more idea about this situation.
You can verify your PHP configuration limits and check your PHP error logs to see the exact error being returned by installing PHP Info plugin.
Do not hesitate to contact us if you need more information.