Would love to try RC6. You mind sending it over since MikroTik won't?Support sent me a copy.
A power cycle finished the upgrade. Thanks.Same case for me. Shutting it off and powering back helped solving this issue. Also, make sure you use firmware for your specific device. I.e. CSS610-8G-2S+ and CSS610-1Gi-7R-2S+ are not cross-compatible.