Hi there! Welcome to the forum!
Live chat scripts are not allowed on InfinityFree hosting. Chat scripts work by constantly refreshing the page in the background.
To enforce this, the chat keyword is blocked on our servers. If you try to access any URL with chat in it, you’ll get a 403 Forbidden page.
You can fix it by replacing chatWindow.php with a new filename which does not contain any “chat” keyword.
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