Big Sur, Adium & iChat Server

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Hey folks,

We run an ichat server in-house, but after updating to Big Sur, Adium no longer connects. Adium has the error "Protocol Violation". The ichat log reads:

[45] [::ffff:xxx.xxx.xxx.xxx, port=57536] connect
Jun 17 08:40:45 xserve jabberd/c2s[195]: [45] SASL authentication succeeded: mechanism=DIGEST-MD5; authzid=xxx@xxx.com, TLS negotiated
Jun 17 08:40:45 xserve jabberd/c2s[195]: od_auth_check_service_membership: checking user "xxx" access for service "chat"
Jun 17 08:40:45 xserve jabberd/c2s[195]: od_auth_check_service_membership: mbr_check_service_membership returned 2
Jun 17 08:40:45 xserve jabberd/c2s[195]: od_auth_check_service_membership: no access restrictions found
Jun 17 08:40:45 xserve jabberd/c2s[195]: [45] bound: jid=xxx@xxx.com/iMac
Jun 17 08:40:45 xserve jabberd/sm[193]: session started: jid=xxx@xxx.com/iMac
Jun 17 08:40:45 xserve jabberd/c2s[195]: [45] [xxx@xxx.com] error: stream read error (Maximum stanza size exceeded)
Jun 17 08:40:45 xserve jabberd/c2s[195]: [45] [::ffff:, xxx.xxx.xxx.xxxport=57536] disconnect jid=xxx@xxx.com.net/iMac, packets: 19
Jun 17 08:40:45 xserve jabberd/sm[193]: session ended: jid=xxx@xxx.com/iMac

I understand this may not me much to go on, but any insight would be appreciated!