Hey ​@Anastasia00 , 

Usually, you’ll see this warning when you need to Manage Missing Fonts.
 
The most common reasons for missing fonts are:

• Missing installed fonts: collaborators are using a local font, which you don't have installed.
• Conflicting versions: collaborators are using a different (older or newer) version of the font.
• Missing font styles: Either the style was missing from a download, or you are using a different version of the font which doesn't include that weight or style.

 
You can find more information on this topic in our guide here: Missing font alert in Figma Design
 
If you already have this font installed on your computer, you can follow the instructions included in this guide here: Add a font to Figma Design

If these workarounds don’t help, please let me know and I can create a support ticket on your behalf for further investigation. Thank you!