i have applied below CSP policy and changed my GWT version to 2.8.2 after that i am getting below error for PRC call ( to read Database and populate the data in UI and save data to DB) and button click ( front validations , read data from DB ..etc).
See https://github.com/gwtproject/gwt/issues/9578 On Wednesday, March 27, 2024 at 8:23:13 AM UTC+1