Many thanks again to Solkap for making these ISOs available on Mega.

I created a Proboards account ages ago and seem to recall having some issues at the time. I’ve had another go tonight at making a new account to see if I can replicate any of the aforementioned problems.

Here are some observations:

Using the first link provided to register for a “Global Account” (https://www.proboards.com/register), I also get stuck at the “agree to terms and conditions page” just as several posters have discovered. Clicking on the link to view the terms and ticking the box to confirm I have read them doesn’t help; the page just refreshes when clicking to finish the process. This registration link may be a dud as I can’t see how to get to it from the Proboards main page.
Using the link in step 2 instead and clicking on “register” does work, however. This appears to be registering for one specific forum only, namely “Swesbrotjbrmls”. I believe this is what worked for Alecthelm a few days ago.
Although this second link worked better, the activation email process was quite flaky. I didn’t get the email automatically, and had to click on the “resend” button twice before getting anything at all. (It wasn’t hiding in my spam folder either.)
Once the activation is complete, the new user should find they are automatically logged in to Solkap’s forum. In order to log in at a future time, it is important to enter the username, not the display name or email address.

Hope this helps.
Bluto