I'm running into problems when trying to make an HTTP request to one particular page using urllib.urequest installed by upip in micropython (version micropython/micropython@eae495a71 with russhughes/st7789_mpy@ff343dc compiled in):

>>> from urllib.urequest import urlopen
>>> res = urlopen('https://aladinonline.androworks.org/')
mbedtls_ssl_handshake error: -4290
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/lib/urllib/urequest.py", line 30, in urlopen
OSError: [Errno 5] EIO

The WiFi connection seems to be working because I can connect to other pages just fine, I didn't find a single page other than this one that would fail with the same error. I tried looking for the -4290 error code in mbedtls documentation, but I couldn't find anything.

The big picture here is that I'm trying to build a tiny weather station with the TTGO T-Display board. The page that I'm trying to connect here offers a very convenient API for data from a particular atmospheric model used for the weather forecast in Europe (ALADIN). My initial goal is to make a request to the API, store the response (which contains a forecast for the next two days) and show some information from it on the board's display. This is my first micropython project though and I have no clue how to debug the issue further. Any ideas?