Hotspot issue, please help

Dears,

I bought a RB1100AHx4 Dude edition, and configured it to balance traffic between 4 WANs, then configured hotspot and added users, they worked perfectly since yesterday, suddenly all users can’t connect to Internet, I rolled back before configuring hotspot, and users can connect again.

What limits the hotspot? Is there anything from my side to be configured?

Note: there is a comment above the hotspot users list “counters and limits for trial users”, why they are trial, what this comment means? Is there any limitations on the concurrent users?

Maybe there is a IP conflict.