Multiple Javascript errors while using Ajax Search Pro

When I am editing a Beaver Builder/Themer template with Ajax Search Pro enabled, I am getting multiple Javascript errors. Ajax Search Pro isn’t any help, yet this only happens with their plugin installed, across multiple sites.

JQMIGRATE: Migrate is installed, version 3.3.2
fl-builder.min.js?ver=2.6.0.3:1 ************************************************************************
fl-builder.min.js?ver=2.6.0.3:1 Beaver Builder caught the following JavaScript error. If Beaver Builder is not functioning as expected the cause is most likely this error. Please help us by disabling all plugins and testing Beaver Builder while reactivating each to determine if the issue is related to a third party plugin.
fl-builder.min.js?ver=2.6.0.3:1 SyntaxError: Unexpected non-whitespace character after JSON at position 32566
    at JSON.parse (<anonymous>)
    at Object._jsonParse (fl-builder.min.js?ver=2.6.0.3:1:186884)
    at _saveSettingsComplete (fl-builder.min.js?ver=2.6.0.3:1:135991)
    at Object.success (fl-builder.min.js?ver=2.6.0.3:1:178585)
    at c (jquery.min.js?ver=3.6.0:2:28327)
    at Object.fireWith [as resolveWith] (jquery.min.js?ver=3.6.0:2:29072)
    at l (jquery.min.js?ver=3.6.0:2:79901)
    at XMLHttpRequest.<anonymous> (jquery.min.js?ver=3.6.0:2:82355)
fl-builder.min.js?ver=2.6.0.3:1 Debug Info
fl-builder.min.js?ver=2.6.0.3:1 AJAX returned HTML page instead of data. (Possible 404 or max_input_vars)
fl-builder.min.js?ver=2.6.0.3:1 PHP Version: 7.4.32
fl-builder.min.js?ver=2.6.0.3:1 Memory Limit: 256M
fl-builder.min.js?ver=2.6.0.3:1 max_input_vars: 18000
fl-builder.min.js?ver=2.6.0.3:1 modsecfix: Disabled
fl-builder.min.js?ver=2.6.0.3:1 ************************************************************************
fl-builder.min.js?ver=2.6.0.3:1 ************************************************************************
fl-builder.min.js?ver=2.6.0.3:1 Beaver Builder caught the following JavaScript error. If Beaver Builder is not functioning as expected the cause is most likely this error. Please help us by disabling all plugins and testing Beaver Builder while reactivating each to determine if the issue is related to a third party plugin.
fl-builder.min.js?ver=2.6.0.3:1 "Uncaught TypeError: Cannot read properties of undefined (reading 'nodeType')" on line 1 of https://glitsa.com/dev/wp-content/plugins/bb-plugin/js/fl-builder.min.js?ver=2.6.0.3.
fl-builder.min.js?ver=2.6.0.3:1 TypeError: Cannot read properties of undefined (reading 'nodeType')
    at _saveSettingsComplete (fl-builder.min.js?ver=2.6.0.3:1:136016)
    at Object.success (fl-builder.min.js?ver=2.6.0.3:1:178585)
    at c (jquery.min.js?ver=3.6.0:2:28327)
    at Object.fireWith [as resolveWith] (jquery.min.js?ver=3.6.0:2:29072)
    at l (jquery.min.js?ver=3.6.0:2:79901)
    at XMLHttpRequest.<anonymous> (jquery.min.js?ver=3.6.0:2:82355)
fl-builder.min.js?ver=2.6.0.3:1 ************************************************************************```