Cant exit twrp (reboot system doesn't work) Using TWRP, I just installed new ROM (ResurrectionRemix-M-v5.7.4-20160922-libra) and OpenGApps (open_gapps-arm64-6.0-pico-20180830) on my Xiaomi Readmi 4c. Both of them were flashed successfully (or at least that's what the twrp said :D), there was no error or anything.

Then I went to "reboot system" and it returned back to the TWRP menu. I cannot boot into the newly flashed ROM.

Please help me solve this problem.

Thanks
This only happens when the android phone doesn't have any ROM or the system itself so it redirects you to the recovery. One way for this is to wipe all out and re-flash everything OR wipe all out and re-flash a different ROM. And a question, Don't you have any backup of you're stock ROM before flashing a new one? It would be better to restore it.