uag-js-592 error + Error: Promised response from onMessage listener went out of

Hello, I have a problem probably with the Spectra plug-in.
So far everything was working ok, however every now and then my site crashes completely. It doesn’t happen all the time and to track down the error I have to have the developer tool open and wait until the page crashes again to see the errors.
As the site is quite popular I am anxious to get it working properly.
Below I’m tossing the error I got displayed in the console, I assume one is related to the other (at least that’s what Uncle google told me).

Unfortunately I didn’t take a screenshot of the crashed page, but more to the point is that just as the page usually has all the styles fixed, during the error it is completely crashed, content that is centered suddenly goes completely out of the window, as if the design setting of the page is completely changed.

I use: 2.15.1 version of Spectra

“Wczytanie si? nie powiod?o dla elementu ?script” ze ?ród?em ?https://prawko.pl/wp-content/uploads/uag-plugin/assets/1000/uag-js-592.js?ver=1731695144”.

Error: Promised response from onMessage listener went out of scope

Translation:

Load failed for element “script” with source “https://prawko.pl/wp-content/uploads/uag-plugin/assets/1000/uag-js-592.js?ver=1731695144”.

Error: Promised response from onMessage listener went out of scope

Update – i managed to take screenshot and new error occured:
https://ibb.co/G2NnGz2 – this is how it crash
https://ibb.co/kqbPNcZ – this should be correct

New error:
Failed to load resource: the server responded with a status of 404 () uag-css-592.css:1

• This topic was modified 1 week, 2 days ago by mwekierowca.

The page I need help with: [log in to see the link]