Can you check your server logfiles? Error appears via desktop client, are there any problems on the web-interface?
Did you change the files manually in the data-folder?
other report with same error: Error: server replied: Precondition failed
Can you check your server logfiles? Error appears via desktop client, are there any problems on the web-interface?
Did you change the files manually in the data-folder?
other report with same error: Error: server replied: Precondition failed