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This issue may happen on some new updates of browsers, such as Chrome, Safari, etc., due to the enforcement of SameSite cookie. This issue will be fixed in the phpFox version 4.8.5

phpFox 4 User Manual > Display Log in form when installing or upgrading app in AdminCP > Screenshot from 2021-05-06 15-16-28.png

Quick solution

We are going to provide guide to solve this issue on Chrome browser.

Open Chrome browser, type on the Address bar: chrome://flags/
Then, search for "SameSite" as the following

phpFox 4 User Manual > Display Log in form when installing or upgrading app in AdminCP > Screenshot from 2021-05-06 15-18-17.png

Change the "SameSite by default cookies" flag from "Default" to "Disabled" and Relauch the browser.

phpFox 4 User Manual > Display Log in form when installing or upgrading app in AdminCP > Screenshot from 2021-05-06 15-24-05.png

Click Relaunch to reload the Chrome browser.

Now, you can go to AdminCP and can install or upgrade apps normally.