Cannot add conditional rules in Contact Form 7

Hello,
I encounter a problem using Conditional Fields for Contact Form 7 in my WordPress page.

After having my contact form written and the groups made, in the Conditional Fields Tab, the “Add new rule” button is not responding at all. Neither do the import/export and the add/overwrite conditions buttons do.

As a result, I cannot add a conditional rule in my contact form. This is my form code:

<fieldset>
<legend>Basic Information</legend>
Name(*)
[text* your-name]

E-mail(*)
[email* e-mail]

</fieldset>
[select group include_blank "Player" "Owner" "Developer" "Investor"]

[group Player]
<fieldset>
<legend>Player</legend>
Subject
[text subject]
Message(*)
[text* message]
</fieldset>
[/group]

[group Owner]
<fieldset>
<legend>Player</legend>
Venue(*)
[text* venue]
Subject
[text subject]
Message(*)
[text* message]
</fieldset>
[/group]

[group Developer]
<fieldset>
<legend>Developer</legend>
Age
[text age]
Previous experience
[text experience]
Your role in the team(*)
[text* role]
</fieldset>
[/group]

[group Investor]
<fieldset>
Invest plan
[radio plan default:1 "Short term" "Long term"]
Your ambition about MatchBox
[text ambition]
</fieldset>
[/group]

(*) Required fields.
[recaptcha]
[submit "Send"]

*I have Contact Form 7 & Contact Form 7 Conditional fields plugins installed.

I will be very grateful if you can help me out.

Thank you very much for your time.

John Koveos.