Good morning
As explained above in my old posts, I have reCaptcha PRO installed and I can't uninstall it because it protects everything else on the site (the Shop section, forms, blogs, etc).
In reCaptcha PRO I use reCaptcha key version 3 and I did NOT enable the 4 "Forum - wpforo" checkboxes.
In the old version of WpForo I had entered the version 3 keys of reCaptcha keys.

With this configuration and the old WpForo version everything worked without problems:
The reCaptcha icon appeared in the bottom right corner of the forum pages indicating that it was active.
Users were register and logging in.
Users were writing and reading without problems.

With the new version 2.X.Y
Already registered users continue to write and intervene.
However, New users can no longer register, so, email me.
In annex a message from a user:

I see a different view (but it is not possible here to annex more than only one image) by trying with the old internet explorer to register my wife (I am already registered with all my emails for various user types and various tests). I use the old internet explore because on Edge and Firefox I already have the forum admin and moderation accounts active and I need to log in as a guest instead for the registration test.

Although the new version 2.X.Y of WpForo should have also worked with version 3 of ReCaptcha as you had written me below, I still tried to put in Wpforo the version 2 key but without success.
I also tried removing the reCaprtcha keys from Wpforo and activating in ReCaptcha PRO the 4 checkboxes related to Wpforo
With each attempt I cleared the IE cache.
All without success.
Do I need to clear WpForo's cache with each attempt?
Even though WpRoket excludes WpForo from its cache, do I have to clear also WpRoket's cache on each attempt as well because reCaptcha PRO is also managed by WpRoket?

Thanks to the help you can provide me.