[FIX] WEBSITE:  Fixed the extremely occurred WARNING and Error traceback of website.

Hello 

Fixed the 'extremely' occured issue of website.
Occurrences recorded over sentry is `43K`.

**Warning:  No field_values found for ids [14949] in browse_record(mail.group, 14949)**.

####  Steps to reproduce:
1. Go to website.
2. Click on the customize menu on top right side.
3. You will see
   * HTML Editor
   * Change Theme
   * Install Apps
4. Switching between this menu gives the WARNING and ERROR traceback on terminal.


Ocurring **#Sentry id ::>   1eb1a76a4faf4cb5b69d77b692a00df6, ffe6ff6e9e6148d4aa95188d64a7e232, 5561efebb714496bacfd875ec23ee1af**

Thankz.