Seafile Connection Error

Hello all,

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

Page unavailable
Sorry, but the requested page is unavailable due to a server hiccup.

Our engineers have been notified, so check back later.

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: "", host: "cloud$

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