I'm new to freenas but not BSD. I'm having the same issue across 2 machines with different hardware, both installed with different install media, created on different machines. One system is a Dell R510, with freenas installed to a SSD. The other is a SuperMicro SSG-6048R-E1CR24L with freenas installed to an internal USB drive. I downloaded & installed 11.0-U2 and the problem went away.
This is what I get after logging into u3. No amount of refreshing the page, or deleting cookies, or changing browsers helps.
This is what I get after logging into u3. No amount of refreshing the page, or deleting cookies, or changing browsers helps.