I should note that I reinstalled Vassal, cleaned out the image tile cache a few times, and have redownloaded the module a couple times as well.
Here is the error log info (relevant lines bolded);
2020-03-22 15:21:43,730 [0-main] INFO VASSAL.launch.StartUp - Starting
2020-03-22 15:21:43,742 [0-main] INFO VASSAL.launch.StartUp - OS Windows 10 10.0
2020-03-22 15:21:43,742 [0-main] INFO VASSAL.launch.StartUp - Java version 1.8.0_241
2020-03-22 15:21:43,743 [0-main] INFO VASSAL.launch.StartUp - VASSAL version 3.2.17
2020-03-22 15:21:44,410 [0-AWT-EventQueue-0] INFO VASSAL.launch.ModuleManager - Manager
2020-03-22 15:22:34,125 [0-SwingWorker-pool-26205593-thread-2] INFO VASSAL.launch.AbstractLaunchAction - Loading module file C:\Users\sutto\Documents\Games\La Bataille d’Austerlitz.vmod
2020-03-22 15:22:48,176 [0-SwingWorker-pool-26205593-thread-2] INFO VASSAL.tools.io.ProcessLauncher - launching C:\Program Files (x86)\Java\jre1.8.0_241\bin\java -classpath lib\Vengine.jar -Xmx1102M -DVASSAL.id=2 -Duser.home=C:\Users\sutto -DVASSAL.port=50902 VASSAL.tools.image.tilecache.ZipFileImageTiler C:\Users\sutto\Documents\Games\La Bataille d’Austerlitz.vmod C:\Users\sutto\AppData\Roaming\VASSAL\tiles\2f596c818428e04a2968cafaab2d50580ff35a26 256 256
2020-03-22 15:22:51,193 [2-main] INFO VASSAL.tools.image.tilecache.ZipFileImageTiler - Starting
2020-03-22 15:22:51,656 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/100 days Formation and Stacking.png
2020-03-22 15:22:52,737 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/100 days other Charts.png
2020-03-22 15:22:53,850 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/100days Movement Chart.png
2020-03-22 15:22:54,791 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/ADN-800.jpg
2020-03-22 15:22:55,365 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/ALC-800.jpg
2020-03-22 15:22:55,917 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Armee der Dritten Koalition.png
2020-03-22 15:22:56,096 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/AssaultChart800.jpg
2020-03-22 15:22:56,443 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz - Premier - Fire Effects + Fire Defence Charts.png
2020-03-22 15:22:57,084 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz - Premier – Melee Mods + Morale Level Mods.jpg
2020-03-22 15:23:01,723 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz - Premier – Melee Mods cont’d.jpg
2020-03-22 15:23:07,122 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz - Premier – Melee Mods.jpg
2020-03-22 15:23:11,697 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz - Premier – Movement + Stacking Charts.png
2020-03-22 15:23:12,256 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz - Premier – Square Formation Chart.png
2020-03-22 15:23:12,813 [2-main] INFO VASSAL.tools.image.tilecache.FileArchiveImageTiler - Tiling images/Austerlitz_Map.png
2020-03-22 15:23:47,793 [2-main] INFO VASSAL.tools.image.FallbackImageTypeConverter - Switching to FileImageTypeConverter…
2020-03-22 15:25:52,508 [2-main] ERROR VASSAL.tools.image.tilecache.ZipFileImageTiler -
java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method) ~[na:1.8.0_241]
at java.net.SocketOutputStream.socketWrite(Unknown Source) ~[na:1.8.0_241]
at java.net.SocketOutputStream.write(Unknown Source) ~[na:1.8.0_241]
at java.io.DataOutputStream.writeByte(Unknown Source) ~[na:1.8.0_241]
at VASSAL.tools.image.tilecache.ZipFileImageTiler$4.receive(ZipFileImageTiler.java:156) ~[Vengine.jar:na]
at VASSAL.tools.image.tilecache.ZipFileImageTiler$4.receive(ZipFileImageTiler.java:154) ~[Vengine.jar:na]
at VASSAL.tools.image.tilecache.TileSlicerImpl.slice(TileSlicerImpl.java:104) ~[Vengine.jar:na]
at VASSAL.tools.image.tilecache.FileArchiveImageTiler.run(FileArchiveImageTiler.java:91) ~[Vengine.jar:na]
at VASSAL.tools.image.tilecache.ZipFileImageTiler.main(ZipFileImageTiler.java:173) ~[Vengine.jar:na]
2020-03-22 15:25:52,511 [2-main] INFO VASSAL.tools.image.tilecache.ZipFileImageTiler - Exiting
2020-03-22 15:25:52,922 [0-SwingWorker-pool-26205593-thread-2] INFO VASSAL.launch.AbstractLaunchAction - Loading module La Bataille d’Austerlitz 1805
2020-03-22 15:25:53,076 [0-SwingWorker-pool-26205593-thread-2] INFO VASSAL.tools.io.ProcessLauncher - launching C:\Program Files (x86)\Java\jre1.8.0_241\bin\java -Xms512M -Xmx1024M -DVASSAL.id=1 -DVASSAL.port=50932 -Duser.home=C:\Users\sutto -Duser.dir=C:\Program Files\VASSAL-3.2.17 -cp lib\Vengine.jar VASSAL.launch.Player --load – C:\Users\sutto\Documents\Games\La Bataille d’Austerlitz.vmod
2020-03-22 15:25:56,888 [1-main] INFO VASSAL.launch.StartUp - Starting
2020-03-22 15:25:56,907 [1-main] INFO VASSAL.launch.StartUp - OS Windows 10 10.0
2020-03-22 15:25:56,908 [1-main] INFO VASSAL.launch.StartUp - Java version 1.8.0_241
2020-03-22 15:25:56,908 [1-main] INFO VASSAL.launch.StartUp - VASSAL version 3.2.17
2020-03-22 15:25:56,909 [1-main] INFO VASSAL.launch.Launcher - Player
2020-03-22 15:26:02,394 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - VASSAL images folder found at jar:file:/C:/Program%20Files/VASSAL-3.2.17/lib/Vengine.jar!/images/
2020-03-22 15:26:02,412 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family network-server created for network-server.png
2020-03-22 15:26:02,413 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family go-down created for go-down.png
2020-03-22 15:26:02,413 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family network-idle created for network-idle.png
2020-03-22 15:26:02,413 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family VASSAL created for VASSAL.png
2020-03-22 15:26:02,414 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family calculator created for calculator.png
2020-03-22 15:26:02,414 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family go-up created for go-up.png
2020-03-22 15:26:02,414 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family VASSAL-jabber created for VASSAL-jabber.png
2020-03-22 15:26:02,415 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family jabber created for jabber.png
2020-03-22 15:26:02,415 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family bug created for bug.png
2020-03-22 15:26:02,415 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family yes created for yes.svg
2020-03-22 15:26:02,416 [1-IconFactory-preload] INFO VASSAL.tools.icon.IconFactory - Icon family no created for no.svg
2020-03-22 15:26:09,451 [1-AWT-EventQueue-0] WARN VASSAL.launch.BasicModule - La Bataille d’Austerlitz 1805 version 1.0
2020-03-22 15:26:34,734 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 0712783ded33ab12e3c329b39c011a290da03c36
2020-03-22 15:26:34,738 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: c937a58c609e70608b39a0c4d4807285624e391f
2020-03-22 15:26:34,740 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 96d1bc4dbf0c4d85293d4559dc409ce94d7b0775
2020-03-22 15:26:34,743 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: e15894f282f46469481501ba771150d9b2658ef1
2020-03-22 15:26:34,745 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 5c545ee4d0dde5d676d21a56af218f3bdc11358f
2020-03-22 15:26:34,748 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 3ca1d443051feaac8900b467638036457b33134c
2020-03-22 15:26:34,750 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: b2107d2b65669c2f374edb002da4dc9200455851
2020-03-22 15:26:34,752 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: d703da090379e0411876ab601d5fae4ec0516358
2020-03-22 15:26:34,754 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 8c8b2aa4b4006969e0a10f0de60a5e70b8f23ddf
2020-03-22 15:26:34,755 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: da290eedaad71aa52d3c9c7516c35303f5b05790
2020-03-22 15:26:34,757 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: aca436c4b0f675da4562d0bfec18d24381d46f31
2020-03-22 15:26:34,759 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 971163bf1186f7f4868b35e4e62831947e434bd6
2020-03-22 15:26:34,762 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 6adb4a27eb33e7256f213abcb0ad03b86d03554e
2020-03-22 15:26:34,764 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 99934054dffe8d82952fdeff9a3c4478ba899ad0
2020-03-22 15:26:34,766 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 13cb0c892a570d766022c46bc560e8ea29f8517b
2020-03-22 15:26:34,767 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: a43b351b7f033d8ce416b6006f83855637141986
2020-03-22 15:26:34,769 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 37897e4c596c1dd59f1ecfafdcf646102d75c43d
2020-03-22 15:26:34,771 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 697094a613e568428dafeaae0d53713c9cf409c4
2020-03-22 15:26:34,773 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 292972f6fd3dd5f87e9a5857930c44a895e370c9
2020-03-22 15:26:34,774 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: 1f3d262c0efd07ac585ab5e8445172f636fb466b
2020-03-22 15:26:34,776 [1-AWT-EventQueue-0] WARN VASSAL.tools.ErrorDialog - Image not found: f9073018b49fe26fb0f0d755eb21918753bc7e42