SAML Login Error


i used Rocket.Chat for a school for a few months.
Since the weekend we are not able to authenticate via SSO (SAML), the folowing error occurs:

Sorry, an annoying error occured
Error: Cannot find module 'xml-encryption'
Close Window

Authentication via LDAP works without problems.

RocketChat is installed on an ubuntu server via snap.
RocketChat is behind a reverse proxy

Regards, jairr