When adding variations, the waiting animation freezes. Where to look?

Question

WordPress

In the admin panel itself, when creating a product variation, after choosing ADD VARIATION and pressing APPLY, a picture of the waiting animation appears and does not disappear. After refreshing the page, the product variation itself is eventually listed as added. But of course it's not that easy to work. Where to look, what to fix? All plugins and wordpress latest version..

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I figured it out myself. In general, some inconsistencies with the plugin for additional images for variations - WooCommerce Additional Variation Images Gallery . After disabling it, the problem went away...