All entries in CSV not loading

Well, the main reason something like this happens with a large upload is reaching a PHP time limit. IF you have access to your PHP error log, you can confirm this.

The setting you need to look at is “max_execution_time” but also look at your “post_max_size” and “upload_max_filesize” settings to make sure they are large enough to handle the upload.

There is also a setting (under General settings) to limit the size of the file to upload. By default the limit is 100 Kilobytes.

File Upload Limit 100 the maximum allowed file size (in kilobytes) for an uploaded file