White page with web components

[abdonrd]

I get a white page with this web components project:

https://freestylestats.com/explore

https://render-tron.appspot.com/render/https://freestylestats.com/explore

How can I debug it?

[abdonrd]

Another page that doesn't work in Rendertron:

https://covid19-hpc-consortium.org/news

https://render-tron.appspot.com/render/https://covid19-hpc-consortium.org/news

[abdonrd]

Another simple page that doesn't work in Rendertron:

https://pwa-lit-template.mybluemix.net/users

https://render-tron.appspot.com/render/https://pwa-lit-template.mybluemix.net/users

Source code: https://github.com/IBM/pwa-lit-template

[abdonrd]

@AVGP do you know how we can debug it?