You should deactivate all plugins (except Required Plugins) and then reactivate them one by one. This makes it very easy to isolate the plugin causing problems.
I found the reason for the large margins, they occur due to the plugin “Import goods to VK.com ” after contacting the author, he gave me this answer:
“My plugin and their library uses (accesses) select2
I’m using 4.1.0
And the “Woodmart” theme uses 4.0.3″
And the error persists, even when the plugins are deactivated.
Tell me, please, are you planning to upgrade to a more recent version?