Hello,
Please re-download HikaShop 4.0.3 in order to re-use the installation file using UTF8 and not UTF8mb4.
Unfortunately, a typo has been introduced in the packaging system and before restoring UTF8mb4 for "production", we will need to perform further tests.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.