Maybe still a bug in the filemanager then. Will look into this. Until this is fixed you can extract it and use the webterminal to change the ownership maybe?
@hollosch changing defaultLanguage to say es and restarting the app works for me - https://github.com/taigaio/taiga-front/blob/master/conf/conf.example.json#L9
thanks for the explanations. I have already contacted digital ocean requesting the release of port 25.
at first, strangely, they claimed that there is no output block on port 25 (although I did the test with the command 'telnet' in the cli).