Hi there! I checked with our development team, and it's something we're working to resolve. Unfortunately, it's a really deep problem, so it's going to take some time on our side to fix. The underlying problem is the number of assets you're trying to export, so you might want to try exporting some manually and packaging it on the side, and removing the batch export setting for some of the assets. Hopefully that helps you to work around the issue, and we're definitely working on a fix for this!
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