I’m not sure whether there is a workaround, but I can speculate a bit.
- The error is thrown in wx.html2, as you can see over here: https://github.com/psychopy/psychopy/blob/cc666628d9d52a85557947635a6a336bed609c02/psychopy/app/pavlovia_ui/_base.py#L91
- When Ducking INET_E_DOWNLOAD_FAILURE, I get a lot of references to Internet Explorer. https://duckduckgo.com/?t=ffab&q=INET_E_DOWNLOAD_FAILURE&ia=web
- Next I Ducked: https://duckduckgo.com/?t=ffab&q=wx+default+webview&ia=web
- Which takes me to a page that gives some suggestions on how to change the default webview. Seems funky stuff though: https://wxpython.org/Phoenix/docs/html/wx.html2.WebView.html
You could consider asking a question in the “other” category about it, then you’ll draw the attention of the Python experts.