JAR won't run in OSX Catalina

I've been trying for several hours to get Ubooquity 2.1.2 to run under Catalina on a late 2013 iMac. I can run 1.10.1 just fine (but can't figure out how to access network drives). None of the 2.x.x versions run at all. I see no clues in the log file. Has anyone had any luck running Ubooquity on Catalina? Thanks.

Here is some of the log:

20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Running with the following parameters - headless: false, libraryport: -1, adminport: -1, remoteadmin: false, host: null, debug: false, execdir: /Applications
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - #############################
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - # Starting Ubooquity #
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - #############################
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Java version: 1.8.0_333
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Java vendor: Oracle Corporation
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - java vm name: Java HotSpot(TM) 64-Bit Server VM
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - java runtime name: Java(TM) SE Runtime Environment
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Max heap size available: 3641 MB
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - OS name: Mac OS X
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - OS version: 10.15.7
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - OS architecture: x86_64
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Loading local version info
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Ubooquity 2.1.2 built on 2018-10-14 at 12:58
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Creating application folders
20220616 23:16:58 [main] INFO com.ubooquity.Ubooquity - Loading preferences
20220616 23:16:58 [main] INFO org.eclipse.jetty.util.log - Logging initialized @1150ms to org.eclipse.jetty.util.log.Slf4jLog
20220616 23:16:58 [main] INFO com.ubooquity.b - Starting internal server...
20220616 23:16:58 [main] INFO com.ubooquity.b - Reverse proxy prefix is not activated
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Scanning books directories
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Finished scanning books directories, populating folders content cache
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Books folder content cache populated
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Scanning comics directories
20220616 23:16:58 [Scanner thread] WARN com.ubooquity.data.database.c - Could not find id of root path /Volumes/McIntosh (5TB)/Comics (ignore this warning if you just added a new root directory)
20220616 23:16:58 [Scanner thread] WARN com.ubooquity.data.database.c - Could not find id of root path /Volumes/McIntosh (5TB)/Comics (ignore this warning if you just added a new root directory)
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Finished scanning comics directories, populating folders content cache
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Comics folder content cache populated
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Comics statistics: [total: 0, added or updated: 0, removed: 0]
20220616 23:16:58 [Scanner thread] INFO com.ubooquity.data.feeder.a - Books statistics: [total: 0, added or updated: 0, removed: 0]
20220616 23:16:58 [main] INFO org.eclipse.jetty.server.Server - jetty-9.4.0.v20161208
20220616 23:16:58 [main] INFO o.e.j.server.handler.ContextHandler - Started o.e.j.s.h.ContextHandler@35841320{/,null,AVAILABLE,@admin}
20220616 23:16:58 [main] INFO o.e.j.server.handler.ContextHandler - Started o.e.j.s.h.ContextHandler@61c4eee0{/,null,AVAILABLE,@library}
20220616 23:16:58 [main] INFO o.e.jetty.server.AbstractConnector - Started library@43f02ef2{HTTP/1.1,[http/1.1]}{0.0.0.0:2202}
20220616 23:16:58 [main] INFO o.e.jetty.server.AbstractConnector - Started admin@239a307b{HTTP/1.1,[http/1.1]}{127.0.0.1:2203}
20220616 23:16:58 [main] INFO org.eclipse.jetty.server.Server - Started @1316ms
20220616 23:16:58 [main] INFO com.ubooquity.b - Internal server started. Listening on port 2202 (library) and 2203 (admin)
20220616 23:16:59 [Timer-1] INFO com.ubooquity.Ubooquity - Checking latest available Ubooquity version from website
20220616 23:17:00 [Timer-1] INFO com.ubooquity.Ubooquity - Latest version available: 2.1.2 - Current version: 2.1.2