Cause: PHP upload or memory limits are too low, or the server cannot reach the asset download server.
Fix:
Check your PHP settings: upload_max_filesize should be at least 64M and memory_limit at least 128M.
Ask your hosting provider to increase these limits if they are too low.
Try downloading again — the plugin skips already-downloaded funnels and resumes from where it left off.
As a last resort, download the asset files manually via FTP. Upload them to wp-content/uploads/listbuilderpro-assets/
Shared Hosting Note: Some shared hosting providers impose strict PHP limits. If you repeatedly have trouble downloading assets, consider upgrading to a VPS or managed WordPress host.