Empty Gray screen after login OH3

I’m doing a fresh install of OH on a PI4. My OH2.4 ubuntu laptop bricked. I’ve gone though the install steps, created an admin user via web UI. When I log in, all I get is a gray screen. The openhab.log file is pretty verbose, so not practical to post whole thing. Here are first few lines. There are several hundred ‘at …’ that follow.

2021-01-24 18:02:16.171 [ERROR] [core.io.rest.auth.internal.JwtHelper] - Error while initializing the JWT helper
java.lang.NullPointerException: null
at java.io.StringReader.(StringReader.java:50) ~[?:?]

Any help appreciated.


Do you have the right Java installed and active?

Which oh3 version are you testing?

My intent was to do a vanilla install right out of the instructions. I’m guessing abuser error. I would have done openhabian, and actually have it downloaded, but I’m fuzzy on whether there are different versions for Pi4 vs 3. Installer that came with the PI suggested here was.

pi@openhabpi:~ $ java --version
openjdk 2020-11-06 LTS
OpenJDK Runtime Environment Zulu11.43+100-CA (build
OpenJDK Client VM Zulu11.43+100-CA (build, mixed mode)

Version: 3.0.0 (Build)

User: openhab (Active Process 3955)
User Groups: openhab tty dialout audio bluetooth

Directories: Folder Name | Path | User:Group
----------- | ---- | ----------
OPENHAB_HOME | /usr/share/openhab | openhab:openhab
OPENHAB_RUNTIME | /usr/share/openhab/runtime | openhab:openhab
OPENHAB_USERDATA | /var/lib/openhab | openhab:openhab
OPENHAB_CONF | /etc/openhab | openhab:openhab
OPENHAB_LOGDIR | /var/log/openhab | openhab:openhab


I have got the same gray screen, after upgrading OH2.5 to OH3.
I am using openhabian, and did also the upgrade with openhabian.

At the first time running http://localhost:8080, I could create an admin account. But when I log in with this account, then I only recieve a grey screen.
Any suggestions, what I can do?

Same issue as this one, but also without a solution: Gray browser 404 Not Found page after logging into OpenHab 3

Same problem here on OH 3.0.1.
I’m not able to login via the local Ip adress:
(the port is correct)
But I’m able to login as admin from an personal domain mydomain:8448 (port is forwarded in the fritz!box)

What is wrong here?

When I delete in CSS the visibility: none; then I see instead of a grey screen this: