Thanks, @rikkerdt,
You can generally see these errors in your browser’s Developer Tools. Every browser should have them. More information on opening your Developer Tools can be found via the Handbook link below:
https://www.ads-software.com/support/article/using-your-browser-to-diagnose-javascript-errors/#step-3-diagnosis
Unfortunately, even with the provided form shortcodes, we’re still unable to replicate this issue. We suspect it has something to do with the theme but cannot pinpoint the exact cause of the error.
We recommend taking a backup of your website, understanding how to do a restore, and installing the WordPress Health Check & Troubleshooting Plugin. This plugin will allow you to disable all plugins except the necessary Contact Form 7 & ReCaptcha v2 for Contact Form 7, along with reverting to a default 20XX Theme. For more information, we recommend reading their documentation, it’s a very nifty and helpful plugin! Using this plugin, you may be able to narrow down if it’s a plugin conflict or a theme conflict.
Hopefully, using the linked tool above, you’re able to narrow down and solve your issue. Should you find what the root cause is, we would love to know. Otherwise, if you have any questions, you may reply back to this thread, and we can attempt to assist further. Have a wonderful rest of your week!