When opening JWEB portal, a prompt message shows up an available upgrade/JWEB version to install on the same, even if the current version installed is the correct one for the Junos OS installed.

If prompt message for upgrading JWEB version shows when login to the portal, even if the current version installed is the correct one for the Junos OS installed, and the upgrade for the JWEB portal is performed, portal can be broken and unable to login again to the site.

To solve the issue, the installation for the right JWEB version through the cli should be performed, in order to get back access to the portal.

You can check which JWEB version is required based on Junos OS, on the following link: https://www.juniper.net/documentation/us/en/software/jweb-ex/jweb-ex-app-package-faq/jweb-ex-application-package/topics/concept/jweb-ex-app-package-faq.html#xd_4081e20476f017c2--1e138ae7-1795628658a--7ffd__section_kgk_ssq_4pb

For installing the package, please run the following command:

>request system software add /var/tmp/<jweb-package-name>

There is no need to reboot the switch after the installation. The J-Web Application package is hot pluggable and installs on top of the current Junos OS image.

If the message for the available version is still appearing after recovering the access, you can safely dismiss the same.