We recently upgraded from Plastic 5.0.44.581 to Plastic 9.0.16.4164 running on Ubuntu, and now get errors when we try to check-in, look at shelved items, double click on a changeset, ... We are running 10.3.22-MariaDB, which was needed for Plastic 5 to work on Ubuntu 19.04. Attached is an image of the error received and below is the log from the server.
From plastic.server.log (cleansed slightly to remove usernames and computer names) an attempt to check-in:
2020-04-23 01:50:44,901 00000000-0000-0000-0000-000000000000 root at DESKTOP INFO Operations - Get info for branch /main/iteration_4 at repository ID 2
2020-04-23 01:50:44,908 root at INFO ChannelCall - conn: 177 protocol:plasticproto sec:ssl recb: 154|rect: 0|sentb: 181|sendt: 0|queuedt: 0|prt: 7|th: 80|dest: 0|mt: 6|sert: 0|zip: 0|cpu: 0| 134.228.27.177|user:xxxxxxxxxxxxxxxx|GetBranchInfoByName
2020-04-23 01:50:44,985 root at INFO ChannelCall - conn: 177 protocol:plasticproto sec:ssl recb: 74|rect: 0|sentb: 37|sendt: 0|queuedt: 0|prt: 1|th: 76|dest: 0|mt: 0|sert: 0|zip: 0|cpu: 0| 134.228.27.177|user:xxxxxxxxxxxxxxxx|GetTriggerList
2020-04-23 01:50:45,076 01e60a66-32f6-40ac-bfd8-dab8543411ff root at Server:server INFO Transaction - Commit transaction 01e60a66-32f6-40ac-bfd8-dab8543411ff. Transaction time 0 ms
2020-04-23 01:50:45,081 00000000-0000-0000-0000-000000000000 root at DESKTOP ERROR Operations - OnError catching exception [z assembly:<unknown assembly> type:<unknown type> member:(null)] - Plastic server version: 9.0.16.4164
2020-04-23 01:50:45,084 root at ERROR PlasticProto.ConnectionFromClient - conn 177. Error in ProcessMethodCall for method TryCheckIn. There has been an unexpected error "z assembly:<unknown assembly> type:<unknown type> member:(null)". For more information check the server log.
Any help on what might be the cause of this would be greatly appreciated.