Hi there,
Sorry to hear about the trouble. I would request you to share a few more details like:
- OS and version of Illustrator
- Is the issue related to a specific document? If yes, could you please share the document with us? You can upload it to the Creative Cloud (https://helpx.adobe.com/in/creative-cloud/help/share.html) and share the download link. We'll take a look at it.
- Where is this file saved (Network Drive/ System HDD/ Shared Folder on System/ External HDD)?
- Please share the screenshot of the loading screen.
- Are there any recent changes made to your system? For example, any antivirus, system updates, plugins, or web extensions installed recently.
- Does resetting Illustrator Preferences (https://helpx.adobe.com/illustrator/using/setting-preferences.html) help to resolve the issue?
Disclaimer: Please note that resetting preferences will remove all the custom settings, and Illustrator will launch with default settings. You can also take a backup of the folders in case you want to. Location is mentioned in the article.
Also, you may try running the app in the Root/ Hidden Admin account (Mac/ Windows) and let us know if you are able to open the file.
I'll be looking forward to your response.
Regards,
Anshul Saini