I am getting a "Not enough storage is available to complete this operation" message when trying to access the tabs in the Schema Browser.
A message about not enough storage or memory from Toad is likely if it is opened for long periods of time, especially if there are multiple connections and sessions open at once. This may also depend on the environment Toad is installed on, but it is best practice to restart Toad every so often to release and reset memory and storage resources. Restarting Toad should resolve the issue.