after I adding the privilege “OpenDeveloperForm” Error won’t appear but instead of the normal log view window came out. Is this the expected view for this scenario?
From 8.5, if you are invoking the server code (Activity, DT) from js you need to register that. Please check the network logs and try to identify for which request this issue is occurring. From that find the specific (activity / DT) rule and register that. Please find the community article which would help you.