Joining a Project by email invitation

The user added me to the Project and i have received the email to join the project … but the below error come when i try to join the project…

Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/website/render.py”, line 32, in render
data = render_page_by_language(path)
File “/home/frappe/frappe-bench/apps/frappe/frappe/website/render.py”, line 101, in render_page_by_language
return render_page(path)
File “/home/frappe/frappe-bench/apps/frappe/frappe/website/render.py”, line 117, in render_page
return build(path)
File “/home/frappe/frappe-bench/apps/frappe/frappe/website/render.py”, line 124, in build
return build_page(path)
File “/home/frappe/frappe-bench/apps/frappe/frappe/website/render.py”, line 140, in build_page
html = frappe.render_template(context.source, context)
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/jinja.py”, line 50, in render_template
return get_jenv().from_string(template).render(context)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/jinja2/environment.py”, line 1008, in render
return self.environment.handle_exception(exc_info, True)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/jinja2/environment.py”, line 780, in handle_exception
reraise(exc_type, exc_value, tb)
File “”, line 1, in top-level template code
File “/home/frappe/frappe-bench/apps/frappe/frappe/./templates/web.html”, line 1, in top-level template code
{% extends base_template_path %}
File “/home/frappe/frappe-bench/apps/frappe/frappe/./templates/base.html”, line 69, in top-level template code
{% block content %}{% endblock %}
File “/home/frappe/frappe-bench/apps/frappe/frappe/./templates/web.html”, line 46, in block “content”
{%- block page_content -%}{%- endblock -%}
File “”, line 37, in block “page_content”
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/./templates/includes/projects/project_tasks.html”, line 9, in top-level template code
{{ (“modified”) }} {{ frappe.utils.pretty_date(task.modified) }}
UndefinedError: '
’ is undefined

this is the error. Check your .html

Hi thanks.
I know that is the error but i should not change the source as this is from Frappe … unless during the upgrade this was not updated !!!

I see, you havent change the core files too? If not try doing bench update.