Upgrade error from Version 2.8.6 to version2.8.7

[hong]

Script URL: helpdesk.xpert-asia.com
Version of script: 2.8.6
Hosting company: VPS
URL of phpinfo.php: helpdesk.xpert-asia.com/info.php
URL of session_test.php:
What terms did you try when SEARCHING for a solution: Upgrade version 2.8.6 to 2.8.7 problem

Write your message below: I got an initial problem, when I tried to change my administrator password, it shows invalid error.
then I try to upgrade to the version 2.8.7 and when I click I accept(click to continue) it remains there and does not go to the next page.

[Klemen]

Hard to guess without having more information.

Please upload phpinfo and session test files from this topic to your help desk and link to them here.