Usually, this type of error appears when frontend of the application cannot communicate with the backend part as the frontend part is older than backend, which can be result of a release upgrade. This usually causes by your browser which has cached old frontend elements (you use them often, so they stay in Local Storage, browser cache) like page cache or scripts. These become outdated but still remain in cache and browser tries using cached data to save time and traffic. These elements need to be deleted after a release upgrade.
Please try to do the following:
- Open developer tools of your browser
- Proceed to Application tab
- Select Storage in the left menu
- In the right side of the selected item you will see the button "Clear site data", click it.
- Then refresh the page while holding "Shift" key on the keyboard.
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