I just upgraded from version 0.52 to 0.60.1 and now all of my connection syncs fail with a generic "Check failed because of an internal error" and all the log files are empty.

I'm sorry to hear that you're experiencing issues after upgrading Airbyte. Based on the knowledge sources, it seems that other users have also encountered similar problems after upgrading to versions 0.57.1 and 0.57.3 from earlier versions like 0.51 and 0.50.50. The error message you're seeing, "Check failed because of an internal error", is similar to the ones reported in these cases [[source 1](https://github.com/airbytehq/airbyte/issues/37401), [source 2](https://github.com/airbytehq/airbyte/issues/36783), [source 3](https://github.com/airbytehq/airbyte/issues/36745)]. Unfortunately, the knowledge sources do not provide a specific solution to this issue. However, some users have reported that rolling back to an earlier version of Airbyte resolved their issues [[source 3](https://github.com/airbytehq/airbyte/issues/36745)]. It's also worth noting that one user mentioned a breaking change in version 0.51.0 related to Docker and Helm deployments, which might be relevant if you're using these tools [[source 3](https://github.com/airbytehq/airbyte/issues/36745)]. I recommend reaching out to the Airbyte community or support for further assistance. They might be able to provide more specific guidance based on your particular setup and the exact error messages you're seeing.