If you are having trouble changing your LinkedIn account password, there are a few possible reasons why it may not be working. Here are some common issues and potential solutions:

Password requirements: LinkedIn has specific requirements for passwords, such as a minimum length and combination of characters. Make sure your new password meets these requirements.
Email delivery issues: After submitting a password change request, LinkedIn will send a verification email to your registered email address. Check your spam or junk mail folders, and make sure that your email account is set up properly.
Account security: LinkedIn may block password changes for security reasons, such as suspicious activity on your account. If you believe this is the case, contact LinkedIn support for assistance.
Technical issues: There may be technical issues on the LinkedIn website or app that are preventing you from changing your password. Try again later or contact LinkedIn support for assistance.
If none of these solutions work, you may need to contact LinkedIn support directly to resolve the issue.