Seafile Connection Error

Hello all,

After updating my Seafile from version 9 to 10, I run into an error after logging in

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The log files from the web server log the following:

2023/12/27 10:57:40 [error] 696#696: *11 connect() failed (111: Connection refused) while connecting to upstream, client:, server: request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8000/", host: "cloud$

Do you have any idea how I can fix the problem? Unfortunately, I cannot identify the error.

BR
David