The logs are more self explanatory than you think. In insights-2020-12-28.0.log, focus on the lines that are timestamped. In your case, they are:
- 2020-12-28 09:14:25,840 [qtp1215951090-21] ERROR com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Exception during pool initialization.
org.postgresql.util.PSQLException: Connection to localhost:49635 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections. - 2020-12-28 09:28:43,876 [qtp727197178-22] ERROR com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Exception during pool initialization.
org.postgresql.util.PSQLException: FATAL: password authentication failed for user "insights" - 2020-12-28 10:42:41,611 [qtp1706272858-24] ERROR com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Exception during pool initialization.
org.postgresql.util.PSQLException: FATAL: password authentication failed for user "jpollack" - Etc....
By the looks of it, your connection to Postgres is bad and that may be causing the rest of the application to hang when trying to work with the workbook.