Error while starting backend

[maparent]

I am attempting to run unigraph locally on an ubuntu machine, following the readme.
When starting the server, dgraph starts without issues, but the backend server bootstrap fails. After a few successful upserts, I get the following error message:

[Subscription] Refreshing subscriptions...
[Subscription] Total of 0 type queries, 0 object queries, and 1 query queries,
[Subscription] Merged into 1 queries.
/home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:415
            entries = lodash_1.default.merge(entries, { _value: makePart(schemaMap[type]._definition, depth + 1, true) });
                                                                                         ^

TypeError: Cannot read properties of undefined (reading '_definition')
    at makePart (/home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:415:90)
    at /home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:438:36
    at Array.forEach (<anonymous>)
    at makePart (/home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:437:47)
    at makePart (/home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:459:56)
    at /home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:423:41
    at Array.map (<anonymous>)
    at makePart (/home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:420:58)
    at makePart (/home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:415:65)
    at /home/unigraph/unigraph-dev/packages/unigraph-dev-common/lib/utils/entityUtils.js:438:36
error Command failed with exit code 1.

I instrumented, and found that the type is subentity; the loop is called successfully (thrice) with type executable.