Signature upload failure (no MSK found) when trying to cross-sign over federation
See original GitHub issueI tried to cross-sign @matthewtest:arasphere.net
from @matthew:matrix.org
from riot/web develop to riot/web develop. It failed with:

despite matthewtest having cross-signing set up:

Issue Analytics
- State:
- Created 3 years ago
- Comments:7 (6 by maintainers)
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Fixed in synapse now
Update: one cause of this bug is now fixed, but there is another. I think 7252 would have affected anyone with existing accounts & rooms who added a device or cross-signing key, but I think 7276 will affect federated user IDs that no user on a server previously shared a room with (eg. if you crate two brand new accounts on different servers & try to verify them).