I am getting the following error installing 8.1
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Ignition Successfully Installed
The wizard has finished installing Ignition on your computer.
Start Ignition Now [Y/n]: y
Install Service [Y/n]: y
INFO [IgnitionInstaller ] [2020/11/04 18:01:26]: Starting Gateway. This should only take a moment..
WARN [IgnitionInstaller ] [2020/11/04 18:01:58]: Unable to start gateway
com.inductiveautomation.ignition.installer.common.actions.InstallAction$WarnInstallException: java.util.concurrent.ExecutionException: java.lang.Exception: Java process exec failed with error code 1: Starting Ignition-Gateway with systemd...
Waiting for Ignition-Gateway..................
WARNING: Ignition-Gateway may have failed to start.
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.install.StartGatewayAction.execute(StartGatewayAction.java:63)
at com.inductiveautomation.ignition.installer.offline/com.inductiveautomation.ignition.installer.offline.OfflineInstaller.finishInstall(OfflineInstaller.java:401)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.ui.text.InstallerTextApplication.lambda$exitSuccessfully$6(InstallerTextApplication.java:272)
at java.base/java.lang.Thread.run(Thread.java:834)
java.util.concurrent.ExecutionException: java.lang.Exception: Java process exec failed with error code 1: Starting Ignition-Gateway with systemd...
Waiting for Ignition-Gateway..................
WARNING: Ignition-Gateway may have failed to start.
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1999)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.executeCommand(AbstractGatewayCommandAction.java:255)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.executeCommand(AbstractGatewayCommandAction.java:208)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.executeWrapperStartCommand(AbstractGatewayCommandAction.java:147)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.install.StartGatewayAction.execute(StartGatewayAction.java:55)
at com.inductiveautomation.ignition.installer.offline/com.inductiveautomation.ignition.installer.offline.OfflineInstaller.finishInstall(OfflineInstaller.java:401)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.ui.text.InstallerTextApplication.lambda$exitSuccessfully$6(InstallerTextApplication.java:272)
at java.base/java.lang.Thread.run(Thread.java:834)
java.lang.Exception: Java process exec failed with error code 1: Starting Ignition-Gateway with systemd...
Waiting for Ignition-Gateway..................
WARNING: Ignition-Gateway may have failed to start.
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.lambda$executeCommand$2(AbstractGatewayCommandAction.java:245)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.utils.ProcessUtils.lambda$waitForProcessToFinish$5(ProcessUtils.java:168)
at java.base/java.util.Optional.ifPresentOrElse(Optional.java:201)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.utils.ProcessUtils.lambda$waitForProcessToFinish$7(ProcessUtils.java:158)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.utils.ProcessUtils.waitForProcessToFinish(ProcessUtils.java:182)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.executeCommand(AbstractGatewayCommandAction.java:244)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.executeCommand(AbstractGatewayCommandAction.java:208)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.common.AbstractGatewayCommandAction.executeWrapperStartCommand(AbstractGatewayCommandAction.java:147)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.actions.install.StartGatewayAction.execute(StartGatewayAction.java:55)
at com.inductiveautomation.ignition.installer.offline/com.inductiveautomation.ignition.installer.offline.OfflineInstaller.finishInstall(OfflineInstaller.java:401)
at com.inductiveautomation.ignition.installer.common/com.inductiveautomation.ignition.installer.common.ui.text.InstallerTextApplication.lambda$exitSuccessfully$6(InstallerTextApplication.java:272)
at java.base/java.lang.Thread.run(Thread.java:834)
I have successfully installed 8.1 on this computer before, but then I restored by gateway backup and it failed to start, so I ran the Uninstaller.run and tried installing 8.1 again, and this is the error I am getting.