Linking issue

When a player links their role in discord sometimes doesnt get applied. In certain cases they have to / unlink and /link again in order to get the role

also getting this error
DiscordAPIError[50013]: Missing Permissions
    at handleErrors (/home/container/node_modules/discord.js/node_modules/@discordjs/rest/dist/index.js:730:13)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async SequentialHandler.runRequest (/home/container/node_modules/discord.js/node_modules/@discordjs/rest/dist/index.js:1133:23)
    at async SequentialHandler.queueRequest (/home/container/node_modules/discord.js/node_modules/@discordjs/rest/dist/index.js:963:14)
    at async _REST.request (/home/container/node_modules/discord.js/node_modules/@discordjs/rest/dist/index.js:1278:22)
    at async GuildMemberManager.edit (/home/container/node_modules/discord.js/src/managers/GuildMemberManager.js:381:15) {
  requestBody: { files: undefined, json: { nick: 'dragonprincessjay' } },
  rawError: { message: 'Missing Permissions', code: 50013 },
  code: 50013,
  status: 403,
  method: 'PATCH',

The bot isn’t able to nickname whomever that is 

why not

Doesn’t have permission

how do i give permission