Look at this post, maybe it's not what is happening, but if the database storage of your environment is full you will need to clean it to not happen again.

https://www.outsystems.com/forums/discussion/76844/communication-error-there-was-an-error-connecting-to-personal-ph7vokpy-outsystem/

If that is not the case I recommend talking with support.

Kind Regards,

Márcio