Probably you’ve exceeded the maximum possible size of a gif-file — 16 Mb.
Group: 6. Questions of community members
6.6 Why can’t I edit/delete my comments?
Probably the site administrator banned editing/deleting of comments or limited time when a user can edit or delete his or her comments. By default you can edit your comments within 10 minutes after publishing, and there is no limit time for deleting messages.
6.5 I can’t write a comment at the website. It says I was banned. What should I do?
You should contact the administraion of the site which banned you from commenting. Tolstoy Comments has nothing to do with moderation rules of each separate site.
6.3 How can I delete my profile?
Sorry, but you can’t do it now. We are going to add this possibility in 2020.
6.2 Messages are sent by ENTER. How can I start a new paragraph then?
You can start a new paragraph using a key combination ctrl+enter. Or you can change a key combination to send a message in the settings of the TC profile.

6.1 I want some privacy: to be able to hide my social media, history of commenting.
You can hide links to your social media pages in your profile settings.
Hiding your comment history, unfortunately, is not yet possible.