Error using custom reference genome

[alimanfoo]

Bug report

Trying to instantiate a browser with a custom reference genome doesn't seem to work.

import ipyigv as igv
from ipyigv.options import ReferenceGenome, Track
print(igv.__version__)

genomeDict = {
    'name': "AgamP4",
    'fastaURL': "https://storage.googleapis.com/vo_agam_release/reference/genome/agamp4/Anopheles-gambiae-PEST_CHROMOSOMES_AgamP4.fa",
    'indexURL': "https://storage.googleapis.com/vo_agam_release/reference/genome/agamp4/Anopheles-gambiae-PEST_CHROMOSOMES_AgamP4.fa.fai",
}
genome = ReferenceGenome(**genomeDict)
browser = igv.IgvBrowser(genome=genome)
browser

Actual outcome

Browser appears, but no chromosomes appear in the dropdown, and an error appears in the browser developer console.

In the browser developer console I get:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'rangeLocus')
    at e.value (138.93ff5122a91b7d500341.js:2)
    at e.<anonymous> (138.93ff5122a91b7d500341.js:2)
    at h (138.93ff5122a91b7d500341.js:2)
    at Generator._invoke (138.93ff5122a91b7d500341.js:2)
    at Generator.next (138.93ff5122a91b7d500341.js:2)
    at vr (138.93ff5122a91b7d500341.js:2)
    at o (138.93ff5122a91b7d500341.js:2)

Expected outcome

IGV browser appears and chromosomes are visible.

Version Info

Run on ipyigv binder in jupyter lab.

• ipyigv version: 0.1.9
• Python version: 3.7.10
• Jupyter lab version: 3.1.11