Not compatible with graylog 4

[lzmarouane]

When tying to import in graylog 4, there is the following error:

Error importing content pack, please ensure it is a valid JSON file. Check your Graylog logs for more information.
Null id at [Source: org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream@33bc6cf6; line: 474, column: 1] (through reference chain: org.graylog2.contentpacks.model.AutoValue_LegacyContentPack$Builder[“id”])

Could you update this cool content_pack?

[boomam]

Similar here -

Could not import content pack
Error importing content pack, please ensure it is a valid JSON file. Check your Graylog logs for more information.
Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null') at [Source: (org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream); line: 8, column: 2]