Hi,
Thank you for your kind words!
Error 500 usually means that the server can not handle the requests. Instead of finishing the whole indexing on the back-end, try turning on the Cron Job. It will slowly but surely index the contents in the background: https://i.imgur.com/I2VMb7y.png
That process will be less demaning, and much slower, but works in the background, and should eventually complete the index.
