Thanks for sharing credentials I went ahead and checked your site dashboard. It seems that your PHP Memory Limit and PHP Execution Time Limit is less than 512M and 300 respectively.
I recommend the following troubleshooting about your demo import from Design Cloud.
1.) Increase PHP Memory Limit
2.) Increase PHP Execution Time Limit
I recommend increasing the following server settings to the specified value or larger. Please consult to your web host for all these server settings
PHP configuration recommended
memory_limit = 512M
upload_max_filesize = 512M
post_max_size = 512M
max_execution_time = 300
max_input_time = 300
Recommended MySQL configuration
max_allowed_packet = 16Mb
innodb_log_file_size = 128mb
Please ask your web host to enable
allow_url_fopen . The value must be On in order for your server to receive data from our server.
After all the server settings configured properly please follow these steps.
- Temporarily disable ConvertPlus while importing the demo content.
- After the import is done then activate it again
If it does not help you, please let us know.