- Use 1 UserScript Manager ONLY (Tampermonkey or AgarioScripts or other)
- Do NOT use Chrome Extensions that affect Agario (other extensions) or any Ad/Popup blockers
- USE 1 MAIN Userscript only on Tampermonkey or AgarioScripts, for example not Legend Mod and Legend Express combined
If using Tampermonkey as UserScript Manager click 
button on top right of browser, then click Dashboard. Keep only one main UserScript, disable the rest
If using AgarioScripts as UserScript Manager click 
button on top right of browser, then click Open Dashboard. Keep only one main UserScript, disable the rest
*Otherwise uninstall UserScript Manager (Tampermonkey or AgarioScripts) and install from webpage again