Error attempting to call function in renderer window that has been closed

I have a head.html file which is imported into all my other html files, inside the head.html file is a script with the following code

const customTitlebar = require('custom-electron-titlebar');

new customTitlebar.Titlebar({
    backgroundColor: customTitlebar.Color.fromHex('#262626')
});

Although whenever I interact with my application I get this error

Attempting to call a function in a renderer window that has been closed or released. Function provided here: Titlebar.registerListeners (D:\Projects\electron-app\node_modules\custom-electron-titlebar\lib\titlebar.js:50:28

It only appears in the console however so does not actually affect my app but I want to know why it is erroring.

Thanks

[RHulshizer]

Hi. I get this same error, but I can assure you that my code only executes once, as it is in Index.html:

const customTitlebar = require(‘custom-electron-titlebar’); new customTitlebar.Titlebar({ backgroundColor: customTitlebar.Color.fromHex(‘#444’), icon: ‘./assets/icon.png’ });

See screenshot

[yafp]

Got the same issue, using version 3.1.0.

It happens i.e. when my app lost focus and then gets focus again. Resulting output:

Attempting to call a function in a renderer window that has been closed or released.
Function provided here: titlebar.js:56:28
Attempting to call a function in a renderer window that has been closed or released.
Function provided here: titlebar.js:56:28
Attempting to call a function in a renderer window that has been closed or released.
Function provided here: titlebar.js:69:28
Attempting to call a function in a renderer window that has been closed or released.
Function provided here: titlebar.js:69:28

so from registerListeners.