Bug fix

Author: JoeyT1994

src/abstractitensornetwork.jl

@@ -640,7 +640,7 @@ end
 # Gauge a ITensorNetwork from cur_region towards new_region, treating
 # the network as a tree spanned by a spanning tree.
 function tree_gauge(alg::Algorithm, ψ::AbstractITensorNetwork, cur_region::Vector, new_region::Vector; kwargs...)
-  path = gauge_path(cur_region, new_region)
+  path = gauge_path(ψ, cur_region, new_region)
   if !isempty(path)
     ψ = typeof(ψ)(gauge_walk(alg, ψ, path; kwargs...))
   end