Patch 11.1.5 introduced new color overrides which in turn created a change for the formatting of Items. As such the regular expression you use inside of Gopher no longer works, and as such, the addon blocks sending Items in chat (specific ones, not all, as I believe the new format is OPTIONAL, I found linking a 675 crafted item causes it to fail every time).

https://warcraft.wiki.gg/wiki/Patch_11.1.5/API_changes

For cases where item quality colors are displayed in strings, new markup support has been added in the form of |cnIQn:text|r where n corresponds to a numeric [Enum.ItemQuality](https://warcraft.wiki.gg/wiki/Enum.ItemQuality) value.

Note, this same library you also use in CrossRP which also breaks it. I had to disable both this and CrossRP to be able to link requests for crafted items.