Can't import Google Keep into Notebook

I'm, trying to import Google Keep notes ("Migrate from Google Keep") into Notebook. I followed the steps to export with Takeout, and uploading the .zip file. But after a few minutes, the import fails with the error "The previous upload operation has failed due to an error. Please upload the file again." Any idea on how to fix this. I tried in Chrome for Windows, Firefox for Windows, Chrome for Linux, and Firefox for Linux. The file is 292MB in size, well under the 500GB limit.

Thanks!

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Migrate your Notebook data to the new, mobile Notebook.
Zoho Notebook is transforming. The new version will include exciting new features and a completely new user experience. The initial version will be mobile based, available for Android and iOS. A new web version will be available after the initial mobile release. With the release of the new Notebook approaching, we're migrating most of your current data to the new version. Once the new version is released, there will be an additional window to migrate your data. We will not provide access to the