The spell shadow blade allows a spellcaster to produce a discrete weapon that can then be used to make attacks:
You weave together threads of shadow to create a sword of solidified gloom in your hand. This magic sword lasts until the spell ends. It counts as a simple melee weapon with which you are proficient. It deals 2d8 psychic damage on a hit and has the finesse, light, and thrown properties (range 20/60). In addition, when you use the sword to attack a target that is in dim light or darkness, you make the attack roll with advantage.
—Shadow Blade, Xanathar’s Guide to Everything, pg. 164
As part of recent errata to the green-flame blade and booming blade cantrips, their material components have been amended to "a melee weapon worth at least 1 sp" (Sword Coast Adventurer’s Guide, 142).
Can shadow blade still produce a weapon that can be used with these cantrips?