May one perform Eruv Tavshilin before Erev Yom Tov or on the night before Yom Tov [i.e. Yom Tov is on Thursday night, may one perform it on Wednesday night, or prior]?

Listen here to audio May one perform Eruv Tavshilin before Erev Yom Tov or on the night before Yom Tov [i.e. Yom Tov is on Thursday night, may one perform it on Wednesday night, or prior]? The initial obligation to perform specifically on Erev Yom Tov:[1] Initially, the Eruv Tavshilin […]