403 Missing Permissions Error

Hello, I am trying to incorporate this ideal scenario. A member fills an application through google forms. Once complete, automatically the discord bot will assign a discord role to the desired member. I keep getting 403 missing permissions error. The bot has all permissions allowed and is assigning a role that is lower in hierarchy. Any help would be appreciated because I am lost.

Have you checked whether the bot has permissions to manage roles? Also might be worth trying to move the bot all the way up in the hierarchy, above admin.