Can't launch Illustrator due to an unknown error

[SHIJAS0D4C]

When I'm open Adobe illustrator 2020 it showing " The operation cannot complete because of an unknown error. [CANT]". can u you help me to fix this issue? 

{Renamed by MOD}

[Srishti Bali · Accepted solution]

Hi there,

Sorry about this trouble. If you are on a Windows machine, please try the steps shared in this help article and let us know how it goes. If that doesn't help, please share a few more details like:

• OS and version of the Illustrator.
• When did this start happening? Are there any recent changes made to your system? For example, any antivirus, system updates or web extensions installed recently. 
• Does resetting Illustrator Preferences (https://helpx.adobe.com/in/illustrator/using/setting-preferences.html) help to resolve the issue?  
  Please note that all the custom settings would reset too. You can also take a backup of the folders in case you want to. Location is mentioned in the article.
  

We’re here to help, just need more info.   

Regards,

Srishti