Hello,
"Assigned" is also a good status for serial consumption ; but if your serials is "used" it means that you already consumed it.
Without details regarding the final URL you got, it will be difficult to understand the situation.
But it will be interesting to focus on the working and non working cases.
For example : You said that if you unpublished the "filtering" plugin, you can perform the consumption ?
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.