Minn. Stat. § 176.361, subd. 4 requires intervenors to appear at conferences and hearings if the intervenor’s claim is at issue. If the intervenor fails to appear then the compensation judge must deny its claim, unless none of the parties object to the intervenor’s motion to intervene or they stipulate to the validity of the intervenor’s claim. Sumner v. Lupient Infiniti, A14-0726 (Minn. July 8, 2015).