Our engineering team has provided an update and the issue with TSP accounts should now be resolved.
We are aware of an issue with updating Thrift Savings Plan (TSP) accounts in Personal Capital. This issue is likely tied to a recent update of the TSP site, and our aggregation team is working on making changes to accommodate this update.
We will update this post as soon as we have more information. Thank you for your patience and understanding while we work through this matter.