Hi @ilya-lohvinau9,

1. Go to the page you have that problem, press F12, and navigate to the Console tab. There you can find all errors and find the JS file which generates it. The JS file path says it's come from a plugin or from the theme. Having this information will help to fix such problems and conflicts very easily.

2. If you don't see any js errors then, you should contact your hosting support and ask them to increase the memory size. More info:   https://www.php.net/manual/en/ini.core.php#ini.memory-limit