Local JATOS doesn´t work, weird layout

[DavidBu16]

Hey there,

I have to get my local jatos running, but after installing JATOS (tried jatos and jatos_mac_java) and JAVA (Temurin-21 jdk) and typing http://127.0.0.1:9000/jatos in my browser (tried several), logging in with "admin admin" an weird result is shown (see photo). Not only the layout is weird, but also clicking on new study doesnt lead to any further reaction.
I tried deleting and installing both jatos and java again, but it stays the same.

Is there anyone that had the same problem and can help me out? I need to get a study running on jatos.

Kind regards
David

[elisafilevich]

Hi, did you check on your settings -> security that Java isn't being blocked from running?

[DavidBu16]

Yes I checked, there s nothing shown. Also tried shutting down the firewall for a second, but it doesnt change the result.

[elisafilevich]

That's odd. I'll ask these things, which is what I would do if I were around.
Which version of JATOS are you running? Do you have another java version that's interfering with this? What do you see on your console when you run jatos? It should say:

jatos_mac_java % ./loader.sh start
JATOS uses local Java
Starting JATOS... 
started
To use JATOS type 127.0.0.1:9000 in your browser's address bar

[DavidBu16]

to me it says: ./loader.sh start
Starting JATOS...
started
To use JATOS type 127.0.0.1:9000 in your browser's address bar

[DavidBu16]

--> with: java version "21.0.1" 2023-10-17 LTS
Java(TM) SE Runtime Environment (build 21.0.1+12-LTS-29)
Java HotSpot(TM) 64-Bit Server VM (build 21.0.1+12-LTS-29, mixed mode, sharing)

[elisafilevich]

JATOS uses Java 11. Downloading the nudged-with-java version should do the trick, but it seems like your java is overriding this somehow. (https://www.jatos.org/Update-JATOS.html)

[EvBu4]

I´m stucked at the same point like David (also using a Mac). I installed Java 11, like you recommended @elisafilevich, tried different browser and activated JavaScript on every browser (I´m not sure if this could be the relevant error, because it´s not exactly the same like activated Java). Do you have any further ideas or recommendations how to fix the problem?

[elisafilevich]

I don't really have an answer. But while we wait for Kristian, who might have some ideas. What happens when you ask for java -version on your terminal?

[kristian-lange]

JATOS still uses Java 8 or 11. There are compatibility issue between some libraries, Scala and Java on one side and the time that I am able to spend to fix them one the other side. They will be fixed but it needs some work. Until then JATOS only runs on Java 8 or 11 (which does not impose any security or other issues btw). I can only guess that on your system you have several Java installed and somehow JATOS chooses the wrong one to run. Can you try do download JATOS bundled with Java (https://github.com/JATOS/JATOS/releases). In those version JATOS is hard-coded to use the bundled Java and not the system's one.

[EvBu4]

Thanks a lot! Firstly, I tried to download Java 11 externally, which didn't fix the problem. But after downloading jatos_mac_java version and activating java in my local Mac settings (it was blocked because the java version wasn´t accepted at a trustable source) it finally worked :) My earlier error was thinking that activating JavaScript in my internet browser would be the same like activating java... Turned out that you have to activate Java locally in your settings. Thanks again for the fast responding, maybe the posts can help other people too.