Created attachment 219553 [details]
If postgreSQL is built without OpenSSL, timescaleDB requires to be build without it also.
The provided patch add option WITH_OPENSSL (default enabled) to the ports for this purpose.
A commit references this bug:
Date: Tue Nov 17 02:25:50 UTC 2020
New revision: 555534
databases/timescaledb: add option to build without OpenSSL
Reported by: simplerezo at gmail.com
Sponsored by: BBOX.io
Please check the above and let me know if it doesn't work for you.