Errors when creating corecomm instances (Lib9 and Lib10)

Question

I am having intermittent issues running Cooja in non-GUI mode.

I'm using Java version 11 and trying to run simulations with Cooja motes. Sometimes it works and sometimes I get one of these error messages: Type 1:

[12:34:59 - main] [Cooja.java:1344] [INFO] - > Starting Cooja
[12:34:59 - main] [Cooja.java:2903] [INFO] - External tools default settings: /external_tools_linux_64.config
[12:34:59 - main] [Cooja.java:2933] [INFO] - External tools user settings: /home/adpe/.cooja.user.properties
[12:34:59 - main] [Simulation.java:436] [INFO] - Simulation random seed: 123456
[12:34:59 - main] [CompileContiki.java:140] [INFO] - > make udp-server.cooja TARGET=cooja 
[12:35:03 - main] [CompileContiki.java:140] [INFO] - > make udp-client.cooja TARGET=cooja 
[12:35:04 - main] [Cooja.java:1366] [FATAL] - Exception when loading simulation: 
org.contikios.cooja.Cooja$SimulationCreationException: Mote type creation error: Error when creating corecomm instance: Lib10
    at org.contikios.cooja.Cooja.loadSimulationConfig(Cooja.java:3528)
    at org.contikios.cooja.Cooja.loadSimulationConfig(Cooja.java:3438)
    at org.contikios.cooja.Cooja.quickStartSimulationConfig(Cooja.java:1359)
    at org.contikios.cooja.Cooja.main(Cooja.java:3316)
Caused by: org.contikios.cooja.MoteType$MoteTypeCreationException: Error when creating corecomm instance: Lib10
    at org.contikios.cooja.CoreComm.createCoreComm(CoreComm.java:334)
    at org.contikios.cooja.contikimote.ContikiMoteType.doInit(ContikiMoteType.java:407)
    at org.contikios.cooja.contikimote.ContikiMoteType.configureAndInit(ContikiMoteType.java:368)
    at org.contikios.cooja.contikimote.ContikiMoteType.setConfigXML(ContikiMoteType.java:1348)
    at org.contikios.cooja.Simulation.setConfigXML(Simulation.java:713)
    at org.contikios.cooja.Cooja.loadSimulationConfig(Cooja.java:3509)
    ... 3 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
    at org.contikios.cooja.CoreComm.createCoreComm(CoreComm.java:326)
    ... 8 more
Caused by: java.lang.UnsatisfiedLinkError: 'void org.contikios.cooja.corecomm.Lib10.init()'
    at org.contikios.cooja.corecomm.Lib10.init(Native Method)
    at org.contikios.cooja.corecomm.Lib10.<init>(Lib10.java:50)
    ... 13 more

Simulation execution time: 5578459530 ns.

Type 2:

[12:25:41 - main] [Cooja.java:1344] [INFO] - > Starting Cooja
[12:25:41 - main] [Cooja.java:2903] [INFO] - External tools default settings: /external_tools_linux_64.config
[12:25:41 - main] [Cooja.java:2933] [INFO] - External tools user settings: /home/adpe/.cooja.user.properties
[12:25:41 - main] [Simulation.java:436] [INFO] - Simulation random seed: 123456
[12:25:41 - main] [CompileContiki.java:140] [INFO] - > make udp-server.cooja TARGET=cooja 
[12:25:43 - main] [Cooja.java:1366] [FATAL] - Exception when loading simulation: 
org.contikios.cooja.Cooja$SimulationCreationException: Mote type creation error: Error when creating corecomm instance: Lib9
    at org.contikios.cooja.Cooja.loadSimulationConfig(Cooja.java:3528)
    at org.contikios.cooja.Cooja.loadSimulationConfig(Cooja.java:3438)
    at org.contikios.cooja.Cooja.quickStartSimulationConfig(Cooja.java:1359)
    at org.contikios.cooja.Cooja.main(Cooja.java:3316)
Caused by: org.contikios.cooja.MoteType$MoteTypeCreationException: Error when creating corecomm instance: Lib9
    at org.contikios.cooja.CoreComm.createCoreComm(CoreComm.java:334)
    at org.contikios.cooja.contikimote.ContikiMoteType.doInit(ContikiMoteType.java:407)
    at org.contikios.cooja.contikimote.ContikiMoteType.configureAndInit(ContikiMoteType.java:368)
    at org.contikios.cooja.contikimote.ContikiMoteType.setConfigXML(ContikiMoteType.java:1348)
    at org.contikios.cooja.Simulation.setConfigXML(Simulation.java:713)
    at org.contikios.cooja.Cooja.loadSimulationConfig(Cooja.java:3509)
    ... 3 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
    at org.contikios.cooja.CoreComm.createCoreComm(CoreComm.java:326)
    ... 8 more
Caused by: java.lang.UnsatisfiedLinkError: 'void org.contikios.cooja.corecomm.Lib9.init()'
    at org.contikios.cooja.corecomm.Lib9.init(Native Method)
    at org.contikios.cooja.corecomm.Lib9.<init>(Lib9.java:50)
    ... 13 more

Simulation execution time: 1850339292 ns.

I've tried running it with several different Java versions but that doesn't help. Has anyone seen this problem before?