Reviewed other posts though haven't found someone experiencing this exact scenario nor fix.
Recently had to adjust the Xfinity username/password, I only saw an option to update password therefore I removed Xfinity as a source and attempted to re-add. I'm running Channels on my Synology NAS.
When I attempt to authenticate I get "Blocked by Xfinity: There was an error processing your request. Please try again." Access Denied. You don't have permission to access "http://login.xfinity.com/login" on this server etc.. (Screenshot below)
Here's a copy/paste of the log as well. I have Auto Auth and 2FA disabled. Attempted on 2 accounts: Viewer Only, Manager, and Primary types.
2026/09/07 17:06:33.829563 [TVE] Auth starting for Comcast_SSO as ******
2026/09/07 17:06:34.464000 [TVE] action=cbs_station err=CBS stream is not available in your location
2026/09/07 17:06:34.626512 [TVE] action=auth mvpd=Comcast_SSO requestor=discovery
2026/09/07 17:06:34.879419 [TVE] action=version product=Chrome/129.0.6668.59 jsVersion=12.9.202.18 protocol=1.3 revision=@8591405f2525be5aa06c825e3051a243c42a80f1
2026/09/07 17:06:34.880011 [TVE] action=page_ready chromeVersion=129
2026/09/07 17:06:34.880321 [TVE] action=navigate url=https://sp.auth.adobe.com/adobe-services/authenticate/saml?domain_name=adobe.com&mso_id=Comcast_SSO&no_iframe=true&noflash=true&redirect_url=https%3A%2F%2Fsp.auth.adobe.com%2Fadobe-services%2FcompletePassiveAuthentication®_code=&requestor_id=discovery
2026/09/07 17:06:34.881104 [TVE] action=request type=Document method=GET url=https://sp.auth.adobe.com/adobe-services/authenticate/saml
2026/09/07 17:06:35.263303 [TVE] action=request type=Document method=GET url=https://oauth.xfinity.com/oauth/authorize redirected_from=https://sp.auth.adobe.com/adobe-services/authenticate/saml
2026/09/07 17:06:35.673820 [TVE] action=request type=Document method=GET url=https://login.xfinity.com/login redirected_from=https://oauth.xfinity.com/oauth/authorize
2026/09/07 17:06:35.673847 [TVE] action=auth_domain domain=login.xfinity.com
2026/09/07 17:06:35.960486 [TVE] action=wait_for_page
2026/09/07 17:06:42.072732 [TVE] action=page_ready
2026/09/07 17:06:42.072813 [TVE] action=wait_for_page done=true reason=page_ready
2026/09/07 17:06:43.169359 [TVE] action=fill_form u=*****
2026/09/07 17:06:43.169399 [TVE] action=wait_for_auth timeout=24s
2026/09/07 17:06:43.174366 [TVE] action=tvejs msg="xfinityLogin: wait"
2026/09/07 17:06:43.174381 [TVE] action=retry_form
2026/09/07 17:06:43.431740 [TVE] action=request type=Document method=POST url=https://login.xfinity.com/login
2026/09/07 17:06:48.618122 [TVE] action=page_ready
2026/09/07 17:06:48.618245 [TVE] action=check_result
2026/09/07 17:06:48.621864 [TVE] action=tvejs msg="xfinityLogin: permission denied"
2026/09/07 17:06:48.621956 [TVE] action=screenshot
2026/09/07 17:06:48.676844 [TVE] action=screenshot file=tve_error_screenshot.png size=18489
2026/09/07 17:06:48.719109 [TVE] action=capture_html
2026/09/07 17:06:48.719941 [TVE] action=capture_html file=tve_error_screenshot.html size=300
2026/09/07 17:06:48.720055 [TVE] action=capture_html
2026/09/07 17:06:48.720637 [TVE] action=capture_html file=tve_error_screenshot.html size=300
2026/09/07 17:06:48.774847 [TVE] action=script_error err=Blocked by Xfinity: There was an error processing your request. Please try again.
2026/09/07 17:06:48.931309 [TVE] action=auth mvpd=Comcast_SSO requestor=C-SPAN
2026/09/07 17:06:49.022532 [TVE] action=version product=Chrome/129.0.6668.59 jsVersion=12.9.202.18 protocol=1.3 revision=@8591405f2525be5aa06c825e3051a243c42a80f1
2026/09/07 17:06:49.023032 [TVE] action=page_ready chromeVersion=129
2026/09/07 17:06:49.023313 [TVE] action=navigate url=https://sp.auth.adobe.com/adobe-services/authenticate/saml?domain_name=adobe.com&mso_id=Comcast_SSO&no_iframe=true&noflash=true&redirect_url=https%3A%2F%2Fsp.auth.adobe.com%2Fadobe-services%2FcompletePassiveAuthentication®_code=&requestor_id=C-SPAN
2026/09/07 17:06:49.024008 [TVE] action=request type=Document method=GET url=https://sp.auth.adobe.com/adobe-services/authenticate/saml
2026/09/07 17:06:49.176898 [TVE] action=request type=Document method=GET url=https://oauth.xfinity.com/oauth/authorize redirected_from=https://sp.auth.adobe.com/adobe-services/authenticate/saml
2026/09/07 17:06:49.355994 [TVE] action=request type=Document method=GET url=https://login.xfinity.com/login redirected_from=https://oauth.xfinity.com/oauth/authorize
2026/09/07 17:06:49.356019 [TVE] action=auth_domain domain=login.xfinity.com
2026/09/07 17:06:49.680483 [TVE] action=wait_for_page
2026/09/07 17:06:55.654912 [TVE] action=page_ready
2026/09/07 17:06:55.654992 [TVE] action=wait_for_page done=true reason=page_ready
2026/09/07 17:06:56.210406 [TVE] action=fill_form u=****
2026/09/07 17:06:56.210415 [TVE] action=wait_for_auth timeout=24s
2026/09/07 17:06:56.215047 [TVE] action=tvejs msg="xfinityLogin: wait"
2026/09/07 17:06:56.215067 [TVE] action=retry_form
2026/09/07 17:06:56.465481 [TVE] action=request type=Document method=POST url=https://login.xfinity.com/login
2026/09/07 17:07:01.632198 [TVE] action=page_ready
2026/09/07 17:07:01.632303 [TVE] action=check_result
2026/09/07 17:07:01.636247 [TVE] action=tvejs msg="xfinityLogin: permission denied"
2026/09/07 17:07:01.636325 [TVE] action=screenshot
2026/09/07 17:07:01.678119 [TVE] action=screenshot file=tve_error_screenshot.png size=18549
2026/09/07 17:07:01.723218 [TVE] action=capture_html
2026/09/07 17:07:01.725064 [TVE] action=capture_html file=tve_error_screenshot.html size=300
2026/09/07 17:07:01.725179 [TVE] action=capture_html
2026/09/07 17:07:01.725745 [TVE] action=capture_html file=tve_error_screenshot.html size=300
2026/09/07 17:07:01.726233 [TVE] action=script_error err=Blocked by Xfinity: There was an error processing your request. Please try again.
2026/09/07 17:07:01.826217 [TVE] Auth failed for Comcast_SSO: Blocked by Xfinity: There was an error processing your request. Please try again.
2026/09/07 17:08:01.245841 [ERR] Failed to load HDHR #C251520F lineup: Get "http://172.18.0.2/lineup.json?tuning&show=found": dial tcp 172.18.0.2:80: connect: connection refused
2026/09/07 17:10:01.763579 [ERR] Failed to load HDHR #C251520F lineup: Get "http://172.18.0.2/lineup.json?tuning&show=found": dial tcp 172.18.0.2:80: connect: connection refused
2026/09/07 17:12:02.281514 [ERR] Failed to load HDHR #C251520F lineup: Get "http://172.18.0.2/lineup.json?tuning&show=found": dial tcp 172.18.0.2:80: connect: connection refused
