Word attempts to connect to a server that no longer exists ...
answers.microsoft.com › en-us › msofficeDec 13, 2017 · If the files, drivers, or fonts are damaged, missing, or located on a remote server, Word can require more time to connect to the server and gather the information that it needs. If Word starts very slowly, or other operations, such as opening or printing documents, also are very slow, this may be due to any one or more of: