Seafile 8.0.4 ubuntu 18 after update to ubuntu 20 problem

the site open the library all in place if you click on the file it will open as usual and if the download writes link is not found, from customers also shows libraries and files and when downloading writes no such file, version of PRO

seahub.log

021-06-27 18:03:23,651 [INFO] seafevents.db:74 create_engine_from_conf [seafevents] database: mysql, name: seahub-db
2021-06-27 18:03:23,696 [INFO] seafevents.db:74 create_engine_from_conf [seafevents] database: mysql, name: seafile-db
2021-06-27 18:03:23,862 [INFO] seafevents.app.config:126 load_file_history_config The file with the following suffix will be recorded into the file hist>
2021-06-27 18:03:23,875 [INFO] seafevents.db:74 create_engine_from_conf [seafevents] database: mysql, name: seahub-db
2021-06-27 18:03:23,876 [INFO] seafevents:118 is_audit_enabled audit is enabled
2021-06-27 18:03:53,248 [INFO] seafes:162 load_seafevents_conf [seafes] use highlighter plain
2021-06-27 18:04:15,108 [INFO] seafes:162 load_seafevents_conf [seafes] use highlighter plain
2021-06-27 18:04:17,073 [INFO] seafes:162 load_seafevents_conf [seafes] use highlighter plain
2021-06-27 18:04:17,083 [INFO] seafes:162 load_seafevents_conf [seafes] use highlighter plain
2021-06-27 18:05:14,253 [INFO] seafes:162 load_seafevents_conf [seafes] use highlighter plain

seafile.log

2021-06-27 21:03:21 start to serve on pipe client
2021-06-27 21:03:53 start to serve on pipe client
2021-06-27 21:04:17 start to serve on pipe client
2021-06-27 21:04:17 start to serve on pipe client
2021-06-27 21:05:14 start to serve on pipe client
2021-06-27 21:05:35 filelock-mgr.c(975): Cleaning expired file locks.

index.log
06/27/2021 21:10:48 [INFO] seafes:208 main: storage: using filesystem storage backend
06/27/2021 21:10:48 [INFO] seafes:210 main: index office pdf: True
06/27/2021 21:10:48 [ERROR] seafes:158 start_index_local: Index process init error: ConnectionError(<urllib3.connection.HTTPConnection object at 0x7fc60>

seafevents.log

[2021-06-27 21:10:46,985] [INFO] starts to index files