Error: Could not find or load main class com.inductiveautomation.ignition.client.launch.BootstrapSwing
Caused by: java.lang.ClassNotFoundException: com.inductiveautomation.ignition.client.launch.BootstrapSwing
This error means that the launchclient.jar file is somehow corrupted/invalid. Basically the only thing it contains is the BootstrapSwing class. Deleting it should force it to be downloaded fresh from the gateway, which hopefully would have fixed it.
If you look at the file on disk, does it show any obvious discrepancies (e.g. a filesize of 0kB) or anything like that? You can also try opening the .jar file as a zip and taking a look at what it contains.
Does your IT group have any security scanning software that might be interfering?
At the point things are failing, the launcher isn't involved any more - the launcher is involved up until the "Starting Java with the following parameters" line you get in the logs, which is where I got the snippet I had you run manually. At that point, the "bootstrap" process uses a launch client jar from the target gateway to kick off a new Java process running the 'full' Vision/Designer application.
You may need to take this to support to get more complete troubleshooting done with your 'live' system.