It might be useful for you to provide the selectors in @notification and @dashboardButton for additional troubleshooting. The error indicates a problem with the syntax, or a character that the browser you're testing with doesn't like, in one of those two decorators.
Here is an example using Selenium 3.141.59.
WebDriverWait webDriverWait = new WebDriverWait(driver, 15); //Use WebdriverWait to give the drop down menu time to display
WebElement selectIssnIsbnButton = webDriverWait.until(ExpectedConditions.elementToBeClickable(By.className("evt-searchTypeButton")));//Find the button assoicated with the dropdown menu.