Can't log in to TAC using HTTPS


You can't log in to the HTTPS web interface of TAC with the default credentials, instead you receive the following 500 error below the login form:

Type 'org.talend.gwttoolkit.client.model.LoginResultBean' was not assignable to '' and did not have a custom field serializer.For security purposes, this type will not be serialized.



When a web application is updated but the web-browser cache is full, the browser will still use the old files and not update the changes.



  1. Stop TAC.
  2. Navigate to tac-installation-folder\apache-tomcat\ and clear all contents of the temp and work folders.
  3. Clear the web-browser cache.
  4. Restart TAC.


Note: this does not always work with the IE browser.

Version history
Revision #:
6 of 6
Last update:
‎02-24-2019 11:18 PM
Updated by:

keywords: clear tac cache


To clear contents of those two folders:

cd [TAC_INSTALLATION_FOLDER]/apache-tomcat
cd temp
rm -rf *
cd ..
cd work
rm -rf *