Item Hard Rejected 5 times

Hi, my item will be hard rejected 5 times. Maybe it’s no so many.
Can someone help what’s going on here?

This is demo:

login: demo
password: demo

This is documentation:

This is thumbnail


Thank you!

What’s the original rejection message?

Thank you for your submission. We have completed our review of “Tape - Real-time messaging platform” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

Thumbnail has dimension 80x80px;
Inline Preview Image has dimension 590x300px;
Preview Screenshots has dimensions less than 900x900px;

Is anybody can help?

You shouldn’t be submitting the item 5 times as a start but the problem is probably with the idea. Whatsapp/Telegram and other system offers “chat rooms” these days and the idea of having “chat box/messenger” is useless, at least as a javascript. You may have a change to get approval as WordPress plugin instead but again, this is the old idea of having chat systems

I think i need to accurate information about possible usages. Yes i agree with you about public messengers WhatsApp like. There is no need to create another one bicycle. But my solution for corporate usage.