Not working in Thunderbird

[Dan-Essin]

Fedora 36, Thunderbird 102, Firefox 104
The extension works in Firefox but in Thunderbird, when testing, it says "Something went wrong. There might be more information in the Browser Console."

The error console says:
ExtensionError: No such native application open_with 4 ExtensionUtils.jsm:58:5
ExtensionError resource://gre/modules/ExtensionUtils.jsm:58
startupPromise resource://gre/modules/NativeMessaging.jsm:81
null background.js:79:11
error_listener moz-extension://9af64f01-5225-4d2e-bc9c-3d9598668de1/background.js:79
XrayWrapper denied access to property "postMessage" (reason: value is callable). See https://developer.mozilla.org/en-US/docs/Xray_vision for more information. Note that only the first denied property access from a given global object will be reported. content-process-forward.js:105:21