In file
GameData\HPTechTree\ModSupport\Tantares_OLD.cfg
in line 143 it says
@PART[Vega_Propellant_A|Vega_Propellant_B|Alnair_LK_Service_A|Alnair_Mono_A|Alnair_Mono_B|Alnair_Mono_C|Alnair_MonoSolar_A:NEEDS[Tantares]:AFTER[Tantares]:FOR[zzzzHPTechTree]
should be
@PART[Vega_Propellant_A|Vega_Propellant_B|Alnair_LK_Service_A|Alnair_Mono_A|Alnair_Mono_B|Alnair_Mono_C|Alnair_MonoSolar_A]:NEEDS[Tantares]:AFTER[Tantares]:FOR[zzzzHPTechTree]