If you see the 1% in demo importer and it can’t complete the import process, please talk to the host administrator and want them to provide the following requirements:
1. 128M Memory Limit
2. Maximum upload size being at least 64MB
3. Maximum post size being at least 64MB
4. Minimum 5.6 version for PHP
After that, if the issue still exists, please want the host administrator to provide the below requirements:
1. The session system is working on your website host
2. The folders have 775 permission and the files have 644 permission
3. The session handler type should be a file.
After all, Follow this article’s instructions. https://digwp.com/2010/11/ftp-in-wpconfig/