Hello,
Thank you for these details, it helped a lot!
The problem is related to a third party which might minified your pages (like an optimization plugin).
In that line, there is a code which replace a character and it looks like it's not appreciated by your plugin.
Please re-download HikaMarket 4.1.1 in order to get a hot-fix.
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.