Unexpected response code from device: 503

Today, I have another big problem. With the FritzBox 7530 and 7590 it doesn’t work GenieACS.
If I try to refresh nothing happens or I get Unexpected response code from device: 503
I can’t understand why…I tried to restart all the services, reset and reboot the router but when I try to refresh for allow it to get the configuration it doesn’t work

I found it this on the logs:
2021-02-16T12:03:43.430Z [ERROR] Uncaught exception; pid=18857 exceptionName="TypeError" exceptionMessage="Cannot read property 'add' of undefined" exceptionStack="TypeError: Cannot read property 'add' of undefined\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1572:55)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)\n at func (/usr/lib/node_modules/genieacs/lib/session.js:1587:22)"

The exception is likely because in one of your scripts you have a typo in one of the attribute names (e.g. path, value). This has been addressed in 1.2 where if you pass invalid attribute names it wouldn’t cause the process to crash.

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