Nope. Same here. However, it's just Chrome on Android that doesn't recognize the CA, even the native android browser is okay. Bizarre, may be coz they have an incomplete cert chain https://www.ssllabs.com/ssltest/analyze.html?d=www.graphengi... and chrome on android has had issues with that
*Edit: checking the site on my phone now and it seems to load, pretty poorly designed site though IMO, unbalanced layout but at least it loads now.