Could not establish connection to the Collabora Online server

[domchrgit]

I made a fresh install of Nextcloud 19 from scratch, and Collabora Online doesn't work

To Reproduce
If I try to open a document like the default one in Documents folders "Welcome to Nextcloud Hub.docx", there is a turning circle and after few seconds I obtain the error message "Failed to load Collabora Online - please try again later"
If I look into the settings of Collabora Online, the built-in CODE server is checked but a red cross indicate "Could not establish connection to the Collabora Online server"

Expected behavior
I expect that Collabora Online works ...

Client details:

• OS: Linux Centos7
• Browser: Chrome
• Version: 83
• Device: desktop

Server details

Operating system:
Linux h2web20 4.9.0-0.bpo.12-amd64 #1 SMP Debian 4.9.210-1~deb8u1 (2020-02-21) x86_64 GNU/Linux

Web server:
Apache 2.4.34

Database:
MySQL 5.7

PHP version:
7.3

Nextcloud version:
19.0.0

Version of the richdocuments app
Text 3.0.1

Version of Collabora Online
Collabora Online 3.7.0
Collabora Online - Built-in CODE Server 4.2.403

[declanmarks]

I also have this issue. I am using an external CODE server which there doesn't appear to be issues because I can navigate to the URL/hosting/capabilities and URL/hosting/discovery successfully shows information.

Operating system:
20.04 LTS (Focal Fossa)

Web server:
Apache/2.4.41 (Ubuntu)

Database:
10.3.22-MariaDB-1ubuntu1 Ubuntu 20.04

PHP version:
7.4.3

Nextcloud version:
18.0.5

Version of the richdocuments app
Text 3.0.7

Version of Collabora Online
Collabora Online 3.7.0
Collabora Online - External CODE Server 4.2.3

[juliusknorr]

For problems regarding the built-in CODE server, please open an issue in the apps repo at https://github.com/CollaboraOnline/richdocumentscode

@declanmarks Please check your log files and open a separate ticket.