Error in output either line or envelope shows up - pine-script-v5

Question

I have used 2 code on Tradingview by LUXALGO
Nadaraya-Watson Estimator
Nadaraya-Watson Envelope
When the code is converted to ver 5.0 and compiled together, no compilation error is shown but the output only reflects either the Estimator Line or Estimator Envelope. Need both outputs together.
To replicate the problem, first select either the Estimator Checkbox or Envelope Checkbox, when both the Estimator and Envelope checkboxes are selected, we get only the envelope and the Estimator line disappears. Need help in resolving this issue.
The code is as below:
I have updated the variables inorder to not mix up while merging 2 scripts
// This work is licensed under a Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) https://creativecommons.org/licenses/by-nc-sa/4.0/
// © LuxAlgo
//#version=5
indicator('Nadaraya-Watson Estimator & Envelope [LuxAlgo]', overlay=true,max_bars_back=1000,max_lines_count=500,max_labels_count=500)
grp_1 = "Estimator Settings"
show_est = input.bool(true, "Show Estimator", group = grp_1)
h_est = input(8.,'Bandwidth', group = grp_1)
src_est = input(close,'Source', group = grp_1)
disclaimer = input(false, 'Hide Disclaimer', group = grp_1)
//----
n_est = bar_index
var ln_est = array.new_line(0)
if barstate.isfirst
for i = 0 to 499
array.push(ln_est,line.new(na,na,na,na))
//----
float y2_est = na
float y1_est = na
float y1_d_est = na
//----
line l_est = na
label lb_est = na
if barstate.islast and show_est
for i_est = 0 to math.min(499,n_est-1)
sum_est = 0.
sumw_est = 0.
for j_est = 0 to math.min(499,n_est-1)
w_est = math.exp(-(math.pow(i_est-j_est,2)/(h_est*h_est*2)))
sum_est += src_est[j_est]*w_est
sumw_est += w_est
y2_est := sum_est/sumw_est
d_est = y2_est - y1_est
l_est := array.get(ln_est,i_est)
line.set_xy1(l_est,n_est-i_est+1,y1_est)
line.set_xy2(l_est,n_est-i_est,y2_est)
line.set_color(l_est,y2_est > y1_est ? #ff1100 : #39ff14)
line.set_width(l_est,2)
if d_est > 0 and y1_d_est < 0
label.new(n_est-i_est+1,src_est[i_est],'▲',color=#00000000,style=label.style_label_up,textcolor=#39ff14,textalign=text.align_center)
if d_est < 0 and y1_d_est > 0
label.new(n_est-i_est+1,src_est[i_est],'▼',color=#00000000,style=label.style_label_down,textcolor=#ff1100,textalign=text.align_center)
y1_est := y2_est
y1_d_est := d_est
//----
var tb_est = table.new(position.top_right, 1, 1
, bgcolor = color.silver)
if barstate.isfirst and not disclaimer
table.cell(tb_est, 0, 0, 'Nadaraya-Watson Estimator [LUX] Repaints'
, text_size = size.small
, text_color = #cc2f3c)
// // This work is licensed under a Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) https://creativecommons.org/licenses/by-nc-sa/4.0/
// // © LuxAlgo
// //#version=5
// indicator("Nadaraya-Watson Envelope [LuxAlgo]",overlay=true,max_bars_back=1000,max_lines_count=500,max_labels_count=500)
grp_2 = "Envelope Settings"
show_env = input.bool(false, "Show Envelope")
length_env = input.float(500,'Window Size',maxval=500,minval=0, group = grp_2)
h_env = input.float(8.,'Bandwidth', group = grp_2)
mult_env = input.float(3., group = grp_2)
src_env = input.source(close,'Source', group = grp_2)
up_col_env = input.color(#39ff14,'Colors',inline='col', group = grp_2)
dn_col_env = input.color(#ff1100,'',inline='col', group = grp_2)
// disclaimer = input(false, 'Hide Disclaimer')
//----
n_env = bar_index
var k_env = 2
var upper_env = array.new_line(0)
var lower_env = array.new_line(0)
lset(l,x1,y1,x2,y2,col)=>
line.set_xy1(l,x1,y1)
line.set_xy2(l,x2,y2)
line.set_color(l,col)
line.set_width(l,2)
if barstate.isfirst and show_env
for i = 0 to length_env/k_env-1
array.push(upper_env,line.new(na,na,na,na))
array.push(lower_env,line.new(na,na,na,na))
//----
line up_env = na
line dn_env = na
//----
cross_up_env = 0.
cross_dn_env = 0.
if barstate.islast and show_env
y_env = array.new_float(0)
sum_e_env = 0.
for i = 0 to length_env-1
sum_env = 0.
sumw_env = 0.
for j = 0 to length_env-1
w_env = math.exp(-(math.pow(i-j,2)/(h_env*h_env*2)))
sum_env += src_env[j]*w_env
sumw_env += w_env
y2_env = sum_env/sumw_env
sum_e_env += math.abs(src_env[i] - y2_env)
array.push(y_env,y2_env)
mae_env = sum_e_env/length_env*mult_env
for i = 1 to length_env-1
y2_env = array.get(y_env,i)
y1_env = array.get(y_env,i-1)
up_env := array.get(upper_env,i/k_env)
dn_env := array.get(lower_env,i/k_env)
lset(up_env,n_env-i+1,y1_env + mae_env,n_env-i,y2_env + mae_env,up_col_env)
lset(dn_env,n_env-i+1,y1_env - mae_env,n_env-i,y2_env - mae_env,dn_col_env)
if src_env[i] > y1_env + mae_env and src_env[i+1] < y1_env + mae_env
label.new(n_env-i,src_env[i],'▼',color=#00000000,style=label.style_label_down,textcolor=dn_col_env,textalign=text.align_center)
if src_env[i] < y1_env - mae_env and src_env[i+1] > y1_env - mae_env
label.new(n_env-i,src_env[i],'▲',color=#00000000,style=label.style_label_up,textcolor=up_col_env,textalign=text.align_center)
cross_up_env := array.get(y_env,0) + mae_env
cross_dn_env := array.get(y_env,0) - mae_env
alertcondition(ta.crossover(src_env,cross_up_env),'Down','Down')
alertcondition(ta.crossunder(src_env,cross_dn_env),'Up','Up')
// //----
// var tb = table.new(position.top_right, 1, 1
// , bgcolor = #35202b)
// if barstate.isfirst and not disclaimer
// table.cell(tb, 0, 0, 'Nadaraya-Watson Envelope [LUX] Repaints'
// , text_size = size.small
// , text_color = #cc2f3c)