Refuses to start if encryption is turned on

[bytedream]

If I set enable: true under the encryption section in the config file, the bridge refuses to start. When it's disabled, everything works fine.

OS: alpine 3.15
Matrix Server: conduit (#39bc84d8) & dendrite v0.8.8
Mautrix-Whatsapp Version: v0.4.0
Full logs:

[Jun 11, 2022 17:55:33] [INFO] Initializing mautrix-whatsapp 0.4.0 (May 16 2022, 17:36:06)
[Jun 11, 2022 17:55:33] [DEBUG] Initializing database connection
[Jun 11, 2022 17:55:33] [DEBUG] Initializing state store
[Jun 11, 2022 17:55:33] [DEBUG] Initializing Matrix event processor
[Jun 11, 2022 17:55:33] [DEBUG] Initializing Matrix event handler
[Jun 11, 2022 17:55:33] [INFO] Bridge initialization complete, starting...
[Jun 11, 2022 17:55:33] [DEBUG] Running database upgrades
[Jun 11, 2022 17:55:33] [Database/Upgrade/INFO] Database currently on v44, latest: v44
[Jun 11, 2022 17:55:33] [DEBUG] Checking connection to homeserver
[Jun 11, 2022 17:55:33] [Matrix/Bot/DEBUG] req #1: GET https://<server>/_matrix/client/versions?user_id=%40whatsappbot%3A<server>
[Jun 11, 2022 17:55:33] [WARN] Server isn't advertising modern spec versions
[Jun 11, 2022 17:55:33] [Matrix/Bot/DEBUG] req #2: GET https://<server>/_matrix/client/v3/account/whoami?user_id=%40whatsappbot%3A<server>
[Jun 11, 2022 17:55:33] [Crypto/Helper/DEBUG] Initializing end-to-bridge encryption...
[Jun 11, 2022 17:55:33] [Crypto/Bot/DEBUG] req #3: GET https://<server>/_matrix/client/v3/login
[Jun 11, 2022 17:55:33] [FATAL] Error initializing end-to-bridge encryption: homeserver does not support appservice login

[tulir]

As the error message suggests, your server doesn't support necessary features from the Matrix spec.

[wrenix]

@tulir you mean dendrite need this?
matrix-org/matrix-spec-proposals#3202
and/or:
matrix-org/matrix-spec-proposals#2409

like here descripted:
matrix-org/dendrite#3280

or what is needed?