Django : Plotly plot shows on localhost but not on heroku - html

Question

I am trying to display some plots(created with plotly) on my page, it works totally fine on localhost but when deployed on heroku the plots are not shown.
code to create plot in views.py
def icons(request, name):
l1 = testtable.objects.values()
d1 = []
d2 = []
for i in l1:
d1.append(i["d1"])
d2.append(i["d2"])
fig =px.bar(x=d1,y=d2)
photo = plotly.io.to_html(fig,config= {'displayModeBar': False})
fig2 = px.line(x=d1, y=d2)
photo1 = plotly.io.to_html(fig2,config= {'displayModeBar': False})
return render(request, 'icons.html', {'name':name,"photo":photo,"photo1":photo1})
code in icons.html
{% extends 'index.html' %} {% block content %}
<div class="content icon-content">
<div class="container icon-container">
<h3 class="icon-heading">Quick Launch</h3>
<div class="icon-bar">
<a class="active" href="#"><i class="fas fa-hand-pointer fa-2x"></i><span>Time In/Out</span></a>
<i class="fa-solid fa-copy fa-2x"></i><span>My Attendance Record</span>
<i class="fa-solid fa-calendar-minus fa-2x"></i><span>My Leave List</span>
<i class="fa-solid fa-file-invoice-dollar fa-2x"></i><span>My Payslips</span>
<i class="fa-solid fa-calendar-check fa-2x"></i><span>Apply Leave</span>
<i class="fa-solid fa-calendar-days fa-2x"></i><span>My Timesheet</span>
<i class="fa-solid fa-people-group fa-2x"></i><span>My Team</span>
</div>
</div>
<hr>
<div class="container icon-container">
<h3 class="icon-heading">Pending My Approval</h3>
<div class="icon-bar">
<a class="active" href="#"><i class="fa-solid fa-file-circle-check fa-2x"></i><span>Leave</span></a>
<i class="fa-solid fa-user-check fa-2x"></i><span>Attendance Regularization</span>
<i class="fa-solid fa-business-time fa-2x"></i><span>Timesheet</span>
</div>
</div>
<div>
{% if photo %} {{ photo|safe }} {% else %}
<p>No graph was provided.</p>
{% endif %}
</div>
<div>
{% if photo1 %} {{ photo1|safe }} {% else %}
<p>No graph was provided.</p>
{% endif %}
</div>
</div>
{% endblock %}
When run on heroku
When run on localhost