Front-end JS error

Hello and many thanks for the great plagin!

From very recently (maybe from CF7 v.5.9.7) the error have been appearing at front-end (I see it in Chrome DevTool):

index.js?ver=5.9.8:1 wpcf7 is not defined.
(anonymous) @ index.js?ver=5.9.8:1
https://forcesail.ru/wp-content/plugins/contact-form-7/includes/js/index.js?ver=5.9.8

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