I tried to log in to see the inside of the platform but the captcha is not working, you should have tested the platform first especially the register and the log in widgets and button before launching it to the public.
No one will join a platform that has bugs and the environment is not attractive the combination of white and blue is always a stand out check this guideline on how to improve your platform appearance
https://blog.hubspot.com/website/blue-website#:~:text=Incorporating%20blue%20into%20your%20website,%2C%20portfolio%2C%20or%20business%20website.