Comment 4 for bug 2036426

Similar issue here:

    ** (gnome-calculator:58236): WARNING **: 14:38:49.211: currency-provider.vala:386: Cannot use ECB rates as don't have EUR rate

    ** (gnome-calculator:58236): WARNING **: 14:38:49.966: currency-provider.vala:161: Couldn't download IMF currency rate file: HTTP/2 Error: INTERNAL_ERROR

    (gnome-calculator:58236): libsoup-WARNING **: 14:38:49.966: (../libsoup/soup-session.c:334):soup_session_dispose: runtime check failed: (soup_connection_manager_get_num_conns (priv->conn_manager) == 0)

    (gnome-calculator:58236): libsoup-WARNING **: 14:38:49.966: (../libsoup/soup-connection-manager.c:84):soup_host_free: runtime check failed: (host->conns == NULL)
Segmentation fault (core dumped)

I can confirm that doing the following has removed the issue:

    dconf write /org/gnome/calculator/refresh-interval 0