Culture 'en' is a neutral culture. It cannot be used in formatting and parsing and therefore cannot be set as the thread's current culture.
Error message is received on opening Report with date parameter.
It is a known issue which is caused by set language in Internet Explorer. eB versions 15.5.1 and 15.6.1 does not supports languages without locale.
In eB server navigate to virtual directory, locate web.config file and open it with text editor.
Search for tag <globalization culture="auto" uiCulture="auto" enableClientBasedCulture="true" />
Change culture and uiCUlture from auto to specific language and locale. As in example it was changed to en-GB
IIS restart is required for changes to take effect.
Open Internet Explorer, navigate to Internet Options>Language and from ‘Language Preferences’ delete language without locale
Then in ‘Language Preferences’ window press on Add button and add language with locale. Save and close it.