loadContextsPlugin is not a function after update

HI,
I have a problem with node red update 0.18.6 -> 0.19.3

Welcome to Node-RED

12 Sep 11:28:20 - [info] Node-RED version: v0.19.3
12 Sep 11:28:20 - [info] Node.js version: v9.4.0
12 Sep 11:28:20 - [info] Linux 4.4.0-62-generic x64 LE
12 Sep 11:28:20 - [info] Loading palette nodes
12 Sep 11:28:21 - [warn] rpi-gpio : Raspberry Pi specific node set inactive
12 Sep 11:28:21 - [warn] rpi-gpio : Cannot find Pi RPi.GPIO python library
12 Sep 11:28:22 - [info] Dashboard version 2.7.0 started at /ui
12 Sep 11:28:22 - [info] Settings file : /data/settings.js
12 Sep 11:28:22 - [error] Failed to start server:
12 Sep 11:28:22 - [error] TypeError: redNodes.loadContextsPlugin is not a function
at /usr/src/node-red/node_modules/node-red/red/runtime/index.js:165:33
at
at process._tickCallback (internal/process/next_tick.js:160:7)
npm info lifecycle node-red-docker@1.0.0~poststart: node-red-docker@1.0.0
npm timing npm Completed in 2623ms
npm info ok

I don't know how to resolve this.
I'am in docker.

Please help
Thanks
Thomas

Opened and closed as an issue - https://github.com/node-red/node-red/issues/1887
Is it still a problem ?

Yes still the problem,
I not sure that is a real "issue" so i open here first.

You say you are using docker. How exactly did you upgrade between NR versions?

I have an image with node-red 0.18.6 in production. I have installed with apt : python gcc make and i have updated with npm install --unsafe-perm node-red@0.19.3 because with npm install --unsafe-perm node-red it comes only 0.18.7 version.
Is it a problem to force 0.19.3 ?