Hi Grusha,
First, I'm just surprised that there is hardly any input about the extension, on the forum and that can often mean that it is no longer developed. The same can be said about how often an extension is updated, so with Joomla 4 on the horizon, it just made me think and I wanted to ask if it will remain developed / updated when required, as it will be a critical part of my registration systems security measures.
I have disabled it a while ago, as it was throwing a Javascript Console error in my Registration System, so let me re-enable it and find the error to post below shortly, to see if you can help get to the bottom of the error being thrown.
Thanks in advance.