Validate that a awaited promises rejection/exceptions are handled

[Samuel-Therrien-Beslogic]

Follow-up to #331

#339 + #345 is ensuring that we have no more floating promises. And refactors catching promise rejections to always show something to the user.

However, there's still plenty of API calls done using await getApiClient(), and many of those likely just let the error bubble up / print to console, without showing any information to the user that something went wrong.

We should go through all await getApiClient() calls and validate that when they throw, something is shown to the user for the error produced.