When you creating domain you gave the message "incorrect DNS zone parameters were specified.('email' = 'firstname.lastname@example.org')".
The php_error.log contain the next sting:
ERR [panel] Failed domain creation: Unable to update domain data: Incorrect DNS zone parameters were specified.('email' = 'example@domain<br />
Plesk panel the message:
The mailing address consists of two lines.
In the email field of clients table, need to find the line containing the carry symbol to the next line.
EXAMPLE: In psa backup file this string is