I'm having the same issue running on the "tve" version of the docker container on version 2021.03.23.0106.
When adding the Spectrum TVE source, I get the message: "Verifying login on Spectrum." This occurs indefinitely.
Relevant info from the log file:
2021/03/23 02:45:57.459083 [TVE] Auth starting for Spectrum as username
2021/03/23 02:45:57.459124 [TVE] action=auth mvpd=Spectrum requestor=nbcentertainment
2021/03/23 02:45:57.925533 [TVE] action=error_response type=Other error=net::ERR_UNKNOWN_URL_SCHEME
2021/03/23 02:45:57.927885 [TVE] action=version product=HeadlessChrome/86.0.4240.111 jsVersion=8.6.395.17 protocol=1.3 revision=@b8c36128a06ebad76af51591bfec980224db5522
2021/03/23 02:45:57.927901 [TVE] action=navigate url=https://sp.auth.adobe.com/adobe-services/authenticate/saml?noflash=true&mso_id=Spectrum&requestor_id=nbcentertainment&no_iframe=true&domain_name=adobe.com&redirect_url=https%3A%2F%2Fsp.auth.adobe.com%2Fadobe-services%2FcompletePassiveAuthentication
2021/03/23 02:45:57.928620 [TVE] action=request type=Document method=GET url=https://sp.auth.adobe.com/adobe-services/authenticate/saml
2021/03/23 02:45:58.455956 [TVE] action=wait_for_page
2021/03/23 02:45:58.479149 [TVE] action=request type=Document method=POST url=https://tve.spectrum.net/openam/SSOPOST/metaAlias/charter/idp
2021/03/23 02:45:58.479164 [TVE] action=auth_domain domain=tve.spectrum.net
2021/03/23 02:46:02.107421 [SNR] Statistics for ch8.8 WFAA-HD: ss=80%,78%-82% snq=93%,87%-100% seq=96%,85%-100% bps=8323512,4474400-10386624 pps=790,425-987 sigerr=25%
2021/03/23 02:46:02.107482 [TNR] Closed connection to 10725740/0 for ch8.8 WFAA-HD
2021/03/23 02:46:04.608486 [TVE] action=page_ready
2021/03/23 02:46:04.608507 [TVE] action=wait_for_page done=true reason=page_ready
2021/03/23 02:46:04.608516 [TVE] action=fill_form u=username
2021/03/23 02:46:25.465141 [TVE] action=tvejs msg="spectrumLoading"
2021/03/23 02:46:25.465286 [TVE] action=wait_for_auth
2021/03/23 02:46:55.465391 [TVE] action=auth_timed_out
2021/03/23 02:46:55.465412 [TVE] action=screenshot
2021/03/23 02:48:02.294221 [TVE] action=tvejs msg="spectrumLoading"