Troubleshooting & FAQ

Debugging setup issues should be done in the Matrix rooms for the bridges (linked in the READMEs), rather than in GitHub issues. Additionally, this page will collect some of the most common issues.

Why is the bridge bot not accepting invites?

If the bridge starts up successfully, but inviting the bot doesn't work and the logs don't show any errors, it usually means the homeserver isn't sending events to the appservice. There are a few potential reasons this can happen:

  • There was a misconfiguration in the appservice address/hostname/port config or the homeserver can't reach the appservice for some other reason. The homeserver logs should contain errors in this case (grep for transactions in Synapse's homeserver.log).
    • Note that grepping for transactions will show some data even when it's working correctly. If it shows nothing at all, something is broken.
  • The bridge was down for longer than a few minutes and the homeserver backed off. The homeserver should retry after some time. If it still doesn't work after an hour or so (exact backoff depends on how long the bridge was down), check the homeserver logs.
  • Synapse messed up and silently broke the appservice. This is becoming relatively common, you should check matrix-org/synapse#1834 if nothing else works. This should be fixed as of Synapse v1.36.0.

pip failed building wheel for python-olm

fatal error: olm/olm.h: no such file or directory

When building with end-to-bridge encryption, you must have a C compiler, python3 dev headers and libolm3 with dev headers installed.

If you want to build without encryption:

  • For Python bridges, don't install the e2be optional dependency.
  • For Go bridges, either build with -tags nocrypto or disable cgo with the CGO_ENABLED=0 env var.

fatal error: olm/pk.h: no such file or directory

libolm2 is too old, you need libolm3.

fatal error: pyconfig.h: no such file or directory

python3-dev is required.

error: command 'gcc' failed: No such file or directory

build-essential is required.

[CRITICAL@mau.init] Configuration error: <field> not configured

You didn't change the value of <field> in the config, but that field must be configured for the bridge to work (i.e. the default value will not work). Dots in <field> mean nesting, e.g. bridge.permissions means the permissions field inside the bridge object.