Connection to language cloud failed - SDL Trados Studio 2019

Hi,

SDL Language Cloud appears not to be working for me for one of my documents. An error message appears stating: 'An error has occurred while using the translation provider SDL Machine Translation: Connection to Language Cloud failed.'

The engine I am using (and which is enabled) is the generic NMT engine for pt-BR > en-GB. Strangely, the generic NMT engine for a different language pair, it-IT > en-GB, is working fine for a separate document.

My version of SDL Trados Studio is Freelance 2019 SR2 - 15.2.5.2145.

I have tried deleting the LanguageCloudMachineTranslation.bin file as per the following, but the problem remains: https://gateway.sdl.com/apex/communityknowledge?articleName=000007601

Let me know if any further information is needed.

Many thanks in advance.

Kind regards,

Shaun