Usync Null Reference error when including dependencies

[r-modica-cti]

Describe the bug
Usync Complete is failing when dependencies are included in content export. No errors are shown in backoffice error log but console shows the following:

Possibly unhandled rejection: {"data":{"ExceptionMessage":"Object reference not set to an instance of an object.","ExceptionType":null,"StackTrace":null},"status":500,"config":{"method":"POST","transformRequest":[null],"transformResponse":[null],"jsonpCallbackParam":"callback","url":"/umbraco/backoffice/usync/usyncnuexporterapi/CreateExport"

The error occurs after some processing has been successful, which means it could be caused by a specific page. The exporter UI is freezing on a page called Tours but that doesn't seem to be the last page from the debug output.

When unchecking the dependencies checkbox, the export completes successfully.

Version (please complete the following information):
v13.3.2 + Exporter (v13.2.3)
Snapshots (v13.2.3),
PeopleEdition (v13.2.3),
Publisher (v13.2.3),
Complete (v13.2.3)

To Reproduce
Steps to reproduce the behavior:
N/A This is related to the data Usync is attempting to export

Expected behavior
Usync handles the issue greacefully and allows the export to continue or flag what the issue is.

Screenshots
N/A

[KevinJump]

Hi,

v8 is out of support :( - but we will take a look at this, can you confirm the version numbers you are running ?

Also you mentioned it doesn't look like "Tours" is the last page in the debug? can you try a couple of exports of smaller sets of content, maybe its a page under tours, or a section - getting an idea of the page it might be would help.

include dependencies, will include data types and doctypes required for the page, what happens if you export all the datatypes or do an export with all the doctypes does that error ?

If you can - could you turn on debugging for uSync in the logs, it might shed more light (it certainly should help getting closer to the point where it errors in the code).

Thanks.

[r-modica-cti]

Hi Kevin, sorry it was late when i created the item and missed the versions, have updated now.

I thought it may be down to images, and i had debug on but it wasn't really telling me very much. I will run this again shortly, the size of the site means this fails several hours in which is painful.