I have 2 CSS326-24G-2S+ running SwOS 2.3. I previously had bad experience trying to upgrade to 2.7. The upgrade went through but they went into boot loop. I was able to reset them and left them on 2.3. Now I am trying to upgrade to 2.8 but both "download and upgrade" or manually uploading ...

After I upgraded both my CSS326-24G-2S+ switches to the 2.8 firmware now I cannot access the web UI. Of every 4 ping attempts, one would respond back. If I constantly refresh my browser, the web UI does come up for a split second until it errors out saying connection was lost. How can I fix the web ...