We have encountered several critical issues (not possible to continue work until solved) with our custom script after 24 february 2020. The most critical is inability of users to perform suitescript 1.0 search.
Script ID customscript184
Line 223 (performing search by script)
Error text: Account: 3883113
Environment: Production
Date & Time: 02/25/2020 11:21 am

Script: Item Selector Client script
Type: Client
Function: selector_init
Error: UNEXPECTED_ERROR (id=k71mf9951mw14wplezz0h)
Ticket: k71mf9951mw14wplezz0h
Произошла непредвиденная ошибка. Щелкните <a href="javascript:window.open('/app/crm/support/nlcorpsupport.nl?l=T&type=bug&ticket=k71mf9951mw14wplezz0h', 'Ошибка','scrollbars=yes,toolbar=no,width=800,height=700');void(0)">здесь</a>, чтобы уведомить службу поддержки и предоставить свою контактную информацию.

Script author can execute this script without issues, while other users including administrator can't do it and gets error.

This is a very critical issue at the moment.