On September 15, the Texas Supreme Court issued an order putting three Green Party nominees back on the ballot. They had not paid the filing fee and a State Court of Appeals had removed them on August 19. In re the Green Party of Texas, 20-0708. Here is the order. It says a full opinion will be issued later.
The Texas Supreme Court had put the Libertarians back on the ballot last week, but on the basis that the Republican Party challenge to them had been filed too late. The fact that the Court has now put the Greens back on the ballot, even though the challenge to them was not too late, suggests that the Texas Supreme Court likely thinks the filing fee is unconstitutional.