Cannot deploy new jobs, make changes, or see new logs.
Save failed: org.talend.exception.BusinessException: Exception caught during execution of reset command. Permission denied
Apache-Tomcat was started with the incorrect user, or the permissions have been changed on the Apache-Tomcat folder structure.
If the logs are blank, and you are receiving permission errors, this implies that TAC has been started by the wrong user. By default, the user should be talend or talenduser, but you should verify that the user that started the service is the same as the owner of the file structure under Apache-Tomcat.
For example, if the service was started by talenduser but the folder structure of Apache-Tomcat is owned by root, then the ownership needs to be transferred back to talenduser.