Error during Minor Upgrade

Good Afternoon,

I’m attempting to upgrade from TimescaleDB 2.2.1 to 2.13.1 on PostgreSQL 13.3. The goal is to upgrade TimescaleDB to 2.13.1 then Upgrade PostgreSQL (I get the same error trying to update to 2.15). I’m receiving the following error:

ALTER EXTENSION timescaledb UPDATE;
ERROR: could not load library “C:/Program Files/PostgreSQL/13/lib/timescaledb-tsl-2.13.1.dll”: The specified procedure could not be found.

I verified the dll is present, and required ssl libraries are also installed correctly. Any thoughts on what is happening? I cannot use Docker, and this is on a Windows 2019 Server. Dependency Walker didn’t show anything interesting.

Thank you,