Unexpected response status code 500

Friends I just installed this GenieACS, however when accessing the UI, and logging in with the admin user I’m having this error:
“Unexpected response status code 500”

And it is being generated by the following log:
November 11 10:50:21 zabbix genieacs-ui [10613]: 2020-11-11T13: 50: 21.420Z [ERROR] Exception not caught; pid = 12075 exceptionName = “TypeError” exceptionMessage = “this.exprSynths.map (…). flat is not a function” exceptionStack = "TypeError: this.exprSynths.map (…). flat is not a function \ n in Lt.true (/ usr / local / lib / node_modules / genieacs / bin / genieacs-ui: 2: 40734) \ n in Bt (/ usr / local / lib / node_modules / genieacs / bin / genieacs-ui: 2 : 48735) \ n in Kt (/ usr / local / lib / node_modules / genieacs / bin / genieacs-ui: 2: 50450) \ n in Yt (/ usr / local / lib / node_modules / genieacs-bin / genieacs-ui : 2: 52738) \ n in Sn.head (/ usr / local / lib / node_modules / genieacs / bin / genieacs-ui: 2: 77352) \ n in dispatch (/ usr / local / lib / node_modules / genieacs / node_modules /koa-compose/index.js:42:32)\n at /usr/local/lib/node_modules/genieacs/node_modules/koa-router/lib/router.js:372:16\n in dispatch (/ usr / local / lib / node_modules / genieacs / node_modules / koa-compose / index.js: 42: 32) \ n at / usr / local / lib / node_modules / genieacs / node_modules /koa-compose/index.js: 34: 12 \ n sending (/ usr / local / lib / node_modules / genieacs / node_modules / koa-rou ter / lib / router.js: 377: 31) "

Can someone help me?

Make sure you’re using Node 12 or higher.