• In Vuforia Experience Service, On Premise installation, Model Target creation is not possible
• In Vuforia Experience Service, at startup, these errors are reported :

ExperienceService configuration does not have VDP user credentials.
Please configure VDP credentials if you are going to use Vuforia Model Target APIs.

• In Vuforia Studio when publishing, in a dialog box, this message is reported :

Uh-oh! Publish failed. Check the log for errors.
Model Targets can only be used with Experience Service 8.1.3 or later.

• In Vuforia Studio, in log file, these exceptions are reported :

error: [twx-studio:cad-target-packager] Response code 502
error: [twx-studio:cad-target-packager] Could not retrieve signature,  {"message":"Could not get authentication token; VDP login/token API returned status=404 and result_code='UnknownAccount'","errorCode":"VDP_LOGIN_ERROR","error":{}}
error: [twx-studio:cad-target-packager] Failed to generate the data set for model C:\Users\XXXX\Documents\ThingWorxStudio\Projects\XXX\dist\phone\app\resources\Uploaded\XXXX.pvz
error: [twx-studio:projectHelper] publishTask error for project XXX Error: Publish failed, issue generating model target information
debug: [twx-studio:sockets] EMIT publishComplete all
     at generateDataSet (C:\Users\XXXX\AppData\Roaming\ThingworxStudio\studio-download.vuforia.io\node_modules\cad-target-packager\index.js:73:11)
     at <anonymous>
     at process._tickDomainCallback (internal/process/next_tick.js:228:7)
error: [twx-studio:index] unhandledRejection Error: Publish failed, issue generating model target information
     at generateDataSet (C:\Users\XXXX\AppData\Roaming\ThingworxStudio\studio-download.vuforia.io\node_modules\cad-target-packager\index.js:73:11)
     at <anonymous>
     at process._tickDomainCallback (internal/process/next_tick.js:228:7)

error: [twx-studio:api] Error occured while publishing project test Error: Publish failed, issue generating model target information
at _Error (C:\Users\6709188\AppData\Roaming\VuforiaStudio\HMC-NAM-D041902\node_modules\@ptc\target-generator\lib\modelTargets.js:23:17)
at ModelTargetGenerator.generateDataSet (C:\Users\6709188\AppData\Roaming\VuforiaStudio\HMC-NAM-D041902\node_modules\@ptc\target-generator\lib\modelTargets.js:206:13)
at runMicrotasks (<anonymous>)
at processTicksAndRejections (internal/process/task_queues.js:95:5)
at async Promise.all (index 0)
at async Promise.all (index 1)
at async Object.publishTask (C:\Users\6709188\AppData\Roaming\VuforiaStudio\HMC-NAM-D041902\dist\server\utils\projectHelper.js:363:25) {
i18n: true