Always thank you for your support. The Insync solution could be more trusted with your consideration and keen communication.
Just regarding the repository issue, I’d like to request that the engineering team perform regular checks to prevent recurring problems. I look forward to continued collaboration with Insync.
First of all, thank you — the issue has been resolved.
For the sake of reference in the forum, I’d like to share the following:
Based on the output of “gpg --show-keys”, it appears that my existing key had expired on 2024-09-08. I did go through an unusual sequence of installing insync → uninstalling it → installing insync-headless, but I’m still not sure how I ended up with an already-expired key in the first place.