Splunk Add-On for Google Cloud Platform failing to load inputs page

[MabreyB]

I have the Splunk Add-on for Google Cloud Platform set up on an IDM server.  I am currently on version 4.4 and have inputs set up already from months ago however, I am trying to send more data to splunk but for some reason the inputs page does not load anymore.  The connection seems to be fine as I am still receiving expected data from my previous inputs but now when i try to add another input I get the following error:

Failed to Load Inputs Page

This is normal on Splunk search heads as they do not require an Input page. Check your installation or return to the configuration page.

Details

AxiosError: Request failed with status code 500

[marnall]

I've had this issue before with a custom app and tried recreating it from scratch to no avail. However, changing the locale in the URL (e.g. en-US to en-GB) somehow got the inputs page to load. Perhaps it will work for you.