Hello @tpenn1655,
My name is Henry and I am happy to assist with your inquiry, and appreciate you contacting LastPass Support!
I am sorry about the issues you are having with the change Master Password process. Please make sure that all the requirements have a green check and that the strength meter is full, otherwise the save password button will remain disabled:
Please let me know if this worked or if further assistance is required.
Thank you,
Henry | Customer Care
got it done. I had to disable popup blocker.
Thanks.