If the error persists after installation, the browser still doesn't know which app to use.
If you prefer using local tools (SecureCRT, PuTTY, etc.), you must install the integration package. Windows Client Side Pack from the official EVE-NG site : After installation, navigate to the C:\Program Files\EVE-NG folder and run the files (e.g., win7_64bit_putty.reg eve-ng open internet shortcut extension dll
If you cannot install local tools, you can avoid this error by changing the console type. If the error persists after installation, the browser