Only getting a loading icon on site after updating to WP 5.5.1

This support request was posted in Flatbase by melissa_om

Request ID #40331 In Progress
  • Hello,

    After updating to WordPress 5.5.1, users can not see the site and only see a loading icon.
    Could the update be the cause? How can I resolve this?


    This is the error that I got in the error console

    nice-scripts.min.js?ver=5.5.1:1 Uncaught TypeError: Cannot read property ‘msie’ of undefined
    at HTMLDocument.<anonymous> (nice-scripts.min.js?ver=5.5.1:1)
    at i (jquery.js?ver=1.12.4-wp:2)
    at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)
    at Function.ready (jquery.js?ver=1.12.4-wp:2)
    at HTMLDocument.J (jquery.js?ver=1.12.4-wp:2)


    I found out that the $.browser property was removed after the WordPress 5.5 update and is available only through the jQuery.migrate plugin.

    I installed it and the site works now!

    Enable jQuery Migrate Helper

    Hi Melissa,

    Thank you for reaching out to us! I hope you’re doing well.

    Which version of Flatbase are you running? WordPress 5.5 deprecated some jQuery related libraries and we released our last version of Flatbase with fixes for that. In case you’re still having problems I’ll recommend that you update to the last version.


    Hello Juan,

    I am running Flatbase 2.0.7. It says that it’s the latest version. I was able to solve the issue after installing the plugin I mentioned earlier.


    Thank you Mel.

    Have a nice day,

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