@odiea I can't replicate this on the development branch I'm working on now. I wonder if this is specific to MySQL 8.4. If it is, then my vote is to just get this release out with MySQL <= 8.3 support and then work on MySQL 8.4 support in a different release. Any chance you can test it in 8.3 or lower to see if the error persists?

Sorry I was testing this in 8.2 or 8.3. Don't know where I got 8.4.

OK, it must have been introduced recently because I just changed to a new branch which has been rebased on the master and I can now replicate it. I'll have to investigate it more after fixing the attributes problems.

In Controller/Giftcards I changes line 61 from Post to Get and it started working better.

public function getSuggest(): void
	{
		$search = $this->request->getGet('term');
		$suggestions = $this->giftcard->get_search_suggestions($search, true);

		echo json_encode($suggestions);
	}

Fix is in master now.