I am unable to update the jenkins plugins
That’s not enough information for others to help you. You’ll need to provide more information.
There are over 250 000 Jenkins controllers running in the world. They are frequently updating their plugins. There must be something different about your environment compared to those environments where it is working well.
Please share more details about your environment, what you have attempted, what messages you encountered, and what you did with those messages. It is much more effective for everyone if you share what you know and what you have learned rather than requiring that others extract that information from you through a series of questions.