When I visit DMT-Nexus on my Droid Turbo smartphone, the Log-In and Register links are disabled.

The web address looks similar to this.......

(closed padlock symbol) https://www.dmt-nexus.me/forum/default.aspx?g=forum

Does anyone know why this is? I don't think its parental settings as I am 45.

Same.

I think that it might be filtering from my cellphone provider, but IDK.

Look into https.
That's what that little lock means. I don't know much about it other than it is more secure than websites that use normal http.

try googling 'dmt nexus login' and see if you can get a referral to the web page

What worked for me was clicking on someone's screen name in a post, then trying to pm them. It brought up the login box & the buttons worked fine there.

Works fine for me although I do have to click around a bit for it to work to the left and down more to hit the login on my Samsung s6

This is how I get around the problem using google chrome on a Samsung GS4. Works like a charm every time!

Good lookin'

Cheers!