I never got any error. On Firefox Linux.
Also, in terms of promotion, Twitter is very good. Set up an account and post a few things. You'll need at least like 4 or 5 posts to get started. Then begin following people that are in the same field, for example, other Godot users, beginner indie developers, etc. If your first 5 posts are good content, they might follow you back and/or like/retweet your posts. But this is a long process and it's hard to get a lot of followers quickly unless you have really good content (for example, new indie game announcements or really good artwork can get you popular).