Co-app is not found

[singularity70]

Your question

Is there a solution for the not-found problem on High-Sierra?

Addon & CoApp version and details

version: 9.1.0.44
target: mozilla
channel: stable
lang: en-GB
coapp: {"found":false,"error":"An unexpected error occurred"}
license: {"unset":true}
platform: x86-64 mac
UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:109.0) Gecko/20100101 Firefox/115.0
{
"used_history_button": true,
"download_directory": "/Users/home/dwhelper",
"never_show_no_incognito_msg_again": true,
"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": false,
"open_count_store": 1,
"successfull_dl": 97
}

[Mattmjs]

What version is your Mac OS ?

[singularity70]

(10.13.5)
found the old version that works.
https://addons.mozilla.org/firefox/downloads/file/4157053/video_downloadhelper-8.0.0.6.xpi
solved.