content_security_policy error while adding extension to browser with switched to manifest v3

[MoriorInvictus]

When i switched to manifest to v3 I got this error from line manifest.content_security_policy = script-src 'self' http://localhost:${port}; object-src 'self'``
And when I try to load the extension, it just tells me the error of https://prnt.sc/n1BGbnNRbkme

How to fix that? if it's required