I found that many stations fail during the initial setup scan with the error "failed: chrome auth_timed_out". For the channels reporting that specific error I have found a workaround.
Sample Error:
2019/07/27 12:42:11 [TVE] Channel scan 78/176 SCIENCE failed: chrome auth_timed_out
Workaround:
Step 1: Go to settings page on DVR server webpage.
Step 2: In Sources section, click the active link "XXX Channels" for your TVE provider.
Step 3: Click the edit button in top Right corner on same line where it says "TVE Channels"
Step 4: Scroll to any channel that shows a status of "auth_timed_out" and click the gear and select "rescan"
Step 5: Wait about 5-10 seconds. Channel should now be added to source.
Step 6: Repeat Step 4 and 5 on all remaining channels with that error. Once completed all channels that previously reported this error were successfully added.
Not sure what is causing the initial scan to fail, but my guess is it is likely a rate limiter of some sort on the PS Vue servers. Also sent a support request with these items and full logs.