This is not Trek, although it may very easily become a Trek issues depending on the outcomes. Short form, Disney is arguing (apparently) that they purchased Lucasfilm's assets but not its liabilities, and is therefore under no requirement to pay royalties for previously published works:
https://www.sfwa.org/2020/11/18/disney-must-pay/
https://www.sfwa.org/2020/11/18/disney-must-pay/