UnhandledPromiseRejectionWarning (after MMM-Remote-Control module setup)

[hsukup1]

Platform: Chromium (latest), RPi3B

Node Version: 9.11.1

MagicMirror Version: v2

Description:
Getting error from MMM-Remote-Control module.

Steps to Reproduce:

1. Install MMM-Remote-Control:
   cd ~/MagicMirror/modules
git clone https://github.com/Jopyth/MMM-Remote-Control.git
cd MMM-Remote-Control
npm install

2. Add module to ~/MagicMirror/config/config.js and update MMM-ModuleScheduler config to turn monitor on/off:

                {
                        module: "MMM-ModuleScheduler",
                        config: {
                               notification_schedule: [
                                        {notification: 'REMOTE_ACTION', schedule: '00 23 * * *', payload: {action: 'MONITOROFF'}},
                                        {notification: 'REMOTE_ACTION', schedule: '45 6 * * *', payload: {action: 'MONITORON'}},
                                ],
                        }
                },
                {
                        module: 'MMM-Remote-Control',
                        position: 'bottom_right'
                },

3. Run as server:
   cd ~/MagicMirror && node serveronly

Expected Results:
smooth sailing

Actual Results:

Configuration: see above

[MichMich]

Please create an issue in the repository of this third party module. Thanks.

[d-Rickyy-b]

I got a pretty similar error log:

(node:8419) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'hash' of null
(node:8419) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:8419) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property 'hash' of null
(node:8419) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: Cannot read property 'hash' of null

...
(node:8419) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 486): TypeError: Cannot read property 'hash' of null
(node:8419) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 487): TypeError: Cannot read property 'hash' of null

I cannot see that the issue is related to a specific module from the log alone. (PS: Could you please add timestamps to the logging? This is really a mess to debug - I can't correlate the events with other information I get because of missing timestamps).

@MichMich could you please help me to identify the source/module where the exception is thrown? Do you need an own issue for this? My guess would be that this happens when the RasPi (connected via WiFi) loses the connection.

Greetings, Rico

[Jopyth]

For further discussion: Jopyth/MMM-Remote-Control#87