WordPress, by default, does not allow SVG file uploads as this XML-based format can contain malicious code. Especially when downloaded from unknown/untrusted sources.
How to enable SVG support
Bricks allows you to enable SVG uploads on a user role basis under “Bricks > Settings > SVG Uploads” (tab: General). Once enabled Bricks will try to sanitise any SVG file uploads.
As the built-in SVG sanitiser isn’t a 100% guarantee to remove all malicious code it is highly recommended you download SVGs only from trusted sources, and only enable SVG uploads for user roles that you trust to follow this rule.