Looks like American Express has been down for a few days. I'm seeing "too much data errors" in the OSU status and this in the log:
==== Mini-OSU Start (20210120/07:52:19) ====
20210120 07:52:19: QFN: Beginning send to
formatting link
07:52:19: ***QFN kQFFinished: returns 67305972
20210120 07:52:19: We?re sorry, the server is experiencing an internal error. Try again now, or wait and try later.
20210120 07:52:19: QFN: End send to
formatting link
30
20210120 07:52:20:
==== Mini-OSU End (20210120/07:52:22) ==== Usenet: The world's first (and best) social network.