https://www.plesk.com/kb/support/unable-to-install-wordpress-on-plesk-domain-getriskrank-return-value-must-be-of-type-string-null-returned/
Unable to install WordPress on Plesk domain: getRiskRank(): Return value must be of type string,...
Symptoms Installing a WordPress instance on an existing or newly added domain fails with the following error: WordPress installed with...