Events & Bookings Fatal Error

When I try to view my homepage (exact URL below, no slug) from WP Admin, I get the following error:

Fatal error: Call to a member function is_main_query() on null in /home/content/a2pewpnas01_data01/75/3959375/html/wp-content/plugins/events-and-bookings/lib/default_filters.php on line 122

When viewing it incognito, I just get a 404.

http://8b4.9a6.myftpupload.com/ (temp domain)

    Nastia

    Hello Trader's Rack , hope you are doing well!

    It looks like a conflict with another plugin that it's installed on your site.

    There is a 404 error on the home page, though I see one more, not so common, error:

    ERR_SSL_VERSION_OR_CIPHER_MISMATCH

    Means that the page can't be loaded securely.

    Would you please, using FTP, navigate to wp-content/plugins/ and rename the /plugins/ folder to /plugins-deactivate/. This will deactivate all the plugins. Right after, check if the error is still showing up on the home page.

    If everything is well, create new /plugins/ folder in the wp-content. Move events folder from the /plugins-deactivate/ into the new /plugins/ folder, check if the error will appear again. If not, move plugins' folders one by one or in groups to test when the issue occurs again.

    If you need assistance, please send your credentials by using our secure contact form
    https://premium.wpmudev.org/contact/#i-have-a-different-question

    Subject: “Attn: Nastia”
    - WordPress admin username
    - WordPress admin password
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    - FTP credentials (host/username/password)
    - Link back to this thread for reference
    - Any other relevant URLs

    Let me know how it went!

    Kind regards,
    Nastia