Unable to import custom extension in ThingWorx 8.4

[BhanuThapa]

Created custom extension as per tutorial https://developer.thingworx.com/en/resources/guides/eclipse-plugin-thingworx-extension-development-tutorial/completed-example-create-extension

Import enable is configured in PlatformSettingsConfig

While importing extension getting following error.

[context: Extension Exception][message: Extension package import failed. See error log for more details.]

Tried Debug log, no more information in logs. Same error with marketplace extension too

How to debug this?

Even though I change ImportPolicy to false still getting same error

[BhanuThapa · Accepted solution]

ExtensionPackageImportPolicy should be under PlatformSettingsConfig in platform setting file.

That was mistake for me. Issue Resolved