This isn't a thing that casinos generally pay for. A user saying "the transaction page doesn't load" would've probably yielded the exact same result.
Casinos usually pay for issues regarding actual business/game logic (infinite money glitch), not 'waaah button is not loading'.
In your write-up you use a lot of fancy words that make it seem like you did something impressive.
"professional-grade technical labor"
"Jackbit’s user dashboard suffered a failure in its transaction history relay logic"
Like, those are things you could see immediately just by opening chrome devtools.
It also seems like you AI-generated a big portion of it, you don't really sound like a technical user.
Overall, don't expect bounties for UI bugs.
EDIT: this could've also very well been (and probably was) a cache error. Take a look at the 2 images below
Config loaderhttps://i.ibb.co/YTdsB9C4/brave-gf7s4-Hpyxd.pngAs you can see, this request is cached to your disk.
Config loader responsehttps://i.ibb.co/QvSjK7ZN/brave-5-Jsrc2nw-Rq.pngAs you can see, again, this request contains the API base for each API call.
How notification check is calledhttps://i.ibb.co/7JTdsJdq/brave-4-Bhma-Ik-Ir2.pngYou can see that the 'fusionUrl' from the previous response is used to call the API.
If the fusionUrl is old or missing, the API call might fail, which is what looks as to have happened to you.
In your writeup:
GET https://jackbit.co/api//Notifications/v2/user-notifications 404 (Not Found)
This doesn't seem to be what an actual JackBit API URL looks like. My guess is that the config failed to load and you called the API with the actual host domain that you were on as the base url.
So yeah, maybe stop and think before you waste hours talking to AI about a fictional bug.