Hi, community!

I have an issue regarding a signup form made from Zoho Campaigns. After submitting I am redirected to a page with the text "Problem in optin - An unknown error occurred. Please try after some time."

Could you please help me? This is the signup form URL: http://zc.vg/RGg9V

Thanks in advance and best!

PS. Issue occurs both with signup form URL and with the form embed into my website.