I appreciate you for reaching out to us here in the Community. Allow me to assist you regarding the error when running the 1099 Transaction Detail report.
We currently have an ongoing issue regarding the error message: "Something went wrong. We are working on it." when running the1099 Transaction Detail report. Our engineers are already working on a fix to ensure you'll be able to get back on track as quickly as possible.
I recommend contacting our Support Specialists so that they can add you on the list of affected users. Affected users on the list will be getting status updates via Email regarding the progress.
In case you need the steps on how to reach them, here are the steps:
Please be sure to let me know if there's anything else I can do here regarding the report, and I'll be sure to get back to you.