[OIDP] Server Error when accesing some pages of the Admin Dasboard

[NilHomedes]

When I try to edit some pages of the admin dashboard it shows me a server error.

The pages where appear the error are:

• Users https://participate.oidp.net/admin/users
• Pages https://participate.oidp.net/admin/static_pages
• Proceses https://participate.oidp.net/admin/participatory_processes
• Consultations https://participate.oidp.net/admin/consultations
• Newsletters https://participate.oidp.net/admin/newsletters

Instead I can edit specific processes or other pages, like this one: https://participate.oidp.net/admin/participatory_processes/award2021/edit?participatory_process_slug=award2021

To reproduce the behaviour:

1. Go to the Admin Dashboard
2. Go to Processes or any other page ( https://participate.oidp.net/admin/participatory_processes )
3. See the server error