Some services of Google, (Gmail, Drive, Docs, Meet, Groups, Chat, Keep and Voice) experienced service outages Thursday morning, according to G Suite status control panel the company's. At the moment, according to the company, all Gmail issues have been resolved (as shown in the status table).
So all morning it was impossible to upload archives across all Google services, such as Gmail attachments in both personal and business G Suite accounts. In some cases, even trying a simple composition to send a new message or reply didn't work.
Google initially said it was investigating issues with Gmail and later officially confirmed a number of issues. Slowly the company began to restore its services and now everything works as before.
The problems appear to have existed globally, according to Downdetector.