Downloads fail on YT using both beta and stable versions

[nguyendata]

Your question

In early May, stable VDH did not work for me; videos were not detected on YT. I then used Beta 9.5.0.0 and it worked well for perhaps my first month after purchasing license.

As of June 17th, downloads no longer work. VDH beta stopped detecting video on YT. At the time of failure, I was running 9.5.0.0 Beta plus the following addons: UBlock Origin +auto HD 4 K / 8K for youtube + google search engine with udm=14 preset. A VPN is always running on my network. I am in USA.

I tried uninstalling** and reinstalling beta 9.5.0.0 with no change to addons. VDH now detected video, but gives error message, "Sadly we failed at downloading that specific media""

I uninstalled** beta and installed stable 9.5.0.2. Received same error message when DL from YT.
I disabled all addons, cleared browser cache, restarted browser. I receive same error message.
Leaving addons disabled, I uninstalled ** stable 9.5.0.2 and reinstalled beta 9.5.0.0, VDH does detect video, but still receive same error.

**Each time I uninstall VDH , I clear browser cache and restart browser.

I have searched and found similar issues but no solution was found in those posts/threads.

Thank you for your assistance!

Addon & CoApp version and details

version: 9.5.0.0
target: mozilla
channel: beta
lang: en-US
coapp: {"found":true,"path":"C:\Program Files\DownloadHelper CoApp\vdhcoapp.exe","version":"2.0.19","new_version":false}
license: {"accepted":true,"email":"","key":"2997dfd936094f6e"}
platform: x86-64 win
UA: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0
{
"valid_license_message_has_been_displayed": true,
"privacy_accept": true,
"last_download_directory": {
"__serializer_tag": "option_some",
"__serializer_value": {
"__serializer_tag": "primitive",
"__serializer_value": "E:\Videos\Comedy"
}
},
"view_options": {
"all_tabs": false,
"low_quality": false,
"sort_by_status": true,
"sort_reverse": false,
"show_button_clean": true,
"show_button_clean_all": false,
"show_button_convert_local": false,
"hide_downloaded": false
},
"use_sidebar": true,
"open_count_store": 4
}

[PavelVinogradov]

The same behavior ("Sadly we failed at downloading that specific media") for youtube videos with DownloadHelper 9.5.0.0 (beta), Firefox 139.0.4

[pnelson2]

Same here. But it started suddenly this afternoon after successfully downloading about a dozen videos earlier today. I rebooted my PC (Windows 10), upgraded to the newest Firefox (139.0.4), with no change. I'm using the Beta that was posted by DownloadHelper a few months ago after that stable version stopped working on YouTube. I'm a paying VDH customer and I'm a YouTube Premium subscriber. I also tried logging out of my YouTube Premium account with no change. I've attached a file.
VDH.txt

[nightshocker]

This has been happening to me for almost 2 weeks. when it is going to get fixed?