[Solved] Cannot load Zebra3 & Repro-1 on Bitwig due to libxcb-keysyms.so.1 something

[icaria36]

This is strange. A couple months ago I could install and load Zebra3 beta and and Repro1 without problems on Bitwig 6 (some beta). I have started fresh with a new Ubuntu 25.10 installation, a new AMD graphics card (if it matters, was Nvidia), and Bitwig 6 beta 15. I have just installed the same U-he plugins using the installer, the clap and vst3 files are in their respective folders but... Bitwig cannot scan them, they don't show up as available plugins. If I use Bitwig's browser to find them, they are there, but when I click on them this error message (that I had never seen before) appears:

Screenshot From 2026-02-22 17-53-31.png

I have searched online and there are just a couple of reports of this error, from years ago, and without clear steps to fix the problem.

Since I'm using a beta version of Bitwig, I thought about installing another clap plugin just in case. I just went for "ANINA - Free spectral shaping plugin", it's one of those plugins that you just need to move the clap file to the .clap folder. Bitwig has recognized immediately and it can load it without problems.

Any idea about what might be happening?

[D-Fusion]

How did you install bitwig (flatpak or ubuntu/deb version)?

[icaria36]

Ubuntu/deb always.

[D-Fusion]

Looks like something is not installed properly since it is missing some libs that Repro needs that it can't find.
Did you install it from their Installer.sh file or did you just copy files over?

Do you have a .u-he folder with the plugin data in your /home/icaria36/ directory?
Also check if the plugins are in the /home/icaria36/.clap directory or in /root/lib/clap directory.

Also try to open your Terminal and copy and paste this to install keysyms1 since it seems to be the missing keysyms1 that might be the biggest issue here.

sudo apt update
sudo apt install libxcb-keysyms1

[icaria36]

In both cases I extracted the compressed files under /Downloads and I ran

Code: Select all

$ ./install.sh

The installation went like usual. A question about the license y/n, replied "y"and the installation was completed. As a result, I have the .clap files in the .clap/u-he folder and there is also an .u-he folder in my home with what looks like all the files for each plugin.

[D-Fusion]

In both cases I extracted the compressed files under /Downloads and I ran

Code: Select all

$ ./install.sh

The installation went like usual. A question about the license y/n, replied "y"and the installation was completed. As a result, I have the .clap files in the .clap/u-he folder and there is also an .u-he folder in my home with what looks like all the files for each plugin.

Edited my post with a solution that might fix it and do a reboot after install

[icaria36]

Thank you D-Fusion, but... I have installed libxcb-keysyms1 and I have rebooted my PC just in case. The same problem with the same error message persists.

[D-Fusion]

Then i am out of ideas on what it can be so maybe it is a bug in the Linux version on Bitwig 6 Beta.

The only other solution i can give is to open terminal and use this command.
ldd /path/to/your/plugin.so and Install any missing libraries using sudo apt install name-of-library of the missing dependencies that pops up as errors in the terminal.

[icaria36]

In case it helps...

This is how the .clap/u-he/ folder looks like.

Screenshot From 2026-02-22 23-33-51.png

The target exists;

Screenshot From 2026-02-22 23-57-41.png

These are the properties of the Zebra3.64.so file.

Screenshot From 2026-02-22 23-59-22.png

[icaria36]

Here is the output of the ldd command. I'm not sure there is any error there? Sorry, I'm and oldtimer Linux user but still "just" a user. I went through the trouble of having an Ubuntu fresh install and I'm reluctant to start installing components without knowing what I'm doing.

Code: Select all

$ ldd /home/icaria36/.u-he/Zebra3/Zebra3.64.so
	linux-vdso.so.1 (0x000070a374835000)
	libgio-2.0.so.0 => /lib/x86_64-linux-gnu/libgio-2.0.so.0 (0x000070a373424000)
	libgobject-2.0.so.0 => /lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x000070a3747b8000)
	libcairo.so.2 => /lib/x86_64-linux-gnu/libcairo.so.2 (0x000070a3732b8000)
	libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x000070a3731da000)
	libxcb-keysyms.so.1 => /lib/x86_64-linux-gnu/libxcb-keysyms.so.1 (0x000070a3747b3000)
	libxcb-shm.so.0 => /lib/x86_64-linux-gnu/libxcb-shm.so.0 (0x000070a3747ac000)
	libxcb-util.so.1 => /lib/x86_64-linux-gnu/libxcb-util.so.1 (0x000070a3731d2000)
	libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x000070a3731a1000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x000070a37319c000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x000070a373197000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x000070a373177000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x000070a37306a000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x000070a372e00000)
	/lib64/ld-linux-x86-64.so.2 (0x000070a374837000)
	libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x000070a372ca8000)
	libgmodule-2.0.so.0 => /lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x000070a373063000)
	libmount.so.1 => /lib/x86_64-linux-gnu/libmount.so.1 (0x000070a372c55000)
	libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x000070a372c1e000)
	libffi.so.8 => /lib/x86_64-linux-gnu/libffi.so.8 (0x000070a373054000)
	libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x000070a372be4000)
	libfontconfig.so.1 => /lib/x86_64-linux-gnu/libfontconfig.so.1 (0x000070a372b92000)
	libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x000070a372a3f000)
	libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x000070a372a2b000)
	libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1 (0x000070a373046000)
	libxcb-render.so.0 => /lib/x86_64-linux-gnu/libxcb-render.so.0 (0x000070a372a1b000)
	libpixman-1.so.0 => /lib/x86_64-linux-gnu/libpixman-1.so.0 (0x000070a372904000)
	libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x000070a3728ef000)
	libbrotlidec.so.1 => /lib/x86_64-linux-gnu/libbrotlidec.so.1 (0x000070a3728e1000)
	libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x000070a3728db000)
	libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x000070a3728d3000)
	libatomic.so.1 => /lib/x86_64-linux-gnu/libatomic.so.1 (0x000070a3728c8000)
	libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0 (0x000070a372819000)
	libblkid.so.1 => /lib/x86_64-linux-gnu/libblkid.so.1 (0x000070a3727dd000)
	libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x000070a3727ae000)
	libbrotlicommon.so.1 => /lib/x86_64-linux-gnu/libbrotlicommon.so.1 (0x000070a37278b000)

[D-Fusion]

The files in your home .clap folder is linked files.
The folder you need to add to bitwig is the /home/icaria36/.clap folder.

There is no error messages in your dependecies test list saying that it is missing something so nothing new to install there.

[icaria36]

The folder you need to add to bitwig is the /home/icaria36/.clap folder.

Yes, I had added it already. When I installed another CLAP plugin, it showed up in Bitwig's browser immediately. The U-he CLAP files are there but they are not shown in the browser (which I guess it's smart, because if they would be accessible, they would produce the ugly error I shared above).

Anyway, I went through the hassle of reinstalling Ubuntu 25.10, Bitwig 6beta15, and Zebra3 beta. Same problem. I installed libxcb-keysyms1, same problem.

I have reported this problem to Bitwig, pointing them, to this discussion. I can't believe I'm the only one hitting this problem but oh well.

EDIT: But I really don't know whether Bitwig has anything to do with this. I just "installed" Pianoteq (meaning, moved the Pianoteq folder under .vst/, where it sits side by side with the uhe folder. Bitwig sees Pianoteq and the plugin works as expected, while Zebra3 isn't even showing up.

[icaria36]

Good news! If anyone finds this problem this is how to solve it:

First install the missing library (no idea why it is missing now, this was never a problem before)

Code: Select all

sudo apt install libxcb-keysyms1

Then reboot your PC.

Then uninstall the U-he plugins (just delete the files from the .clap, .vst and .uhe holders) and reinstall them again.

If all goes well, Bitwig will detect them and load them normally.

The last step did the trick. I realized this when (not knowing what else to do) I installed Zebralette3 and to my surprise It Just Worked. I figured that reinstalling Zebra3 and Repro might be the missing step.

Thank you very much D-Fusion for your patience with me.

[D-Fusion]

Good news! If anyone finds this problem this is how to solve it:

First install the missing library (no idea why it is missing now, this was never a problem before)

Code: Select all

sudo apt install libxcb-keysyms1

Then reboot your PC.

Then uninstall the U-he plugins (just delete the files from the .clap, .vst and .uhe holders) and reinstall them again.

If all goes well, Bitwig will detect them and load them normally.

The last step did the trick. I realized this when (not knowing what else to do) I installed Zebralette3 and to my surprise It Just Worked. I figured that reinstalling Zebra3 and Repro might be the missing step.

Thank you very much D-Fusion for your patience with me.

Happy to help
When i saw the error report i had the feeling that Ubuntu was missing that Lib/dependency file which is why it was the first thing i suggested that you should install and reboot

Good to see that you are finally up and running and maybe that Lib-file is not included in Bitwig 6 Beta since i have never seen that error on Bitwig V5.3.13 that i am using

[icaria36]

Bitwig support says that it seems the plugin has this dependency, not Bitwig Studio itself.

Well, time will tell if this was just a glitch between Ubuntu - U-he - Bitwig or if it's a bug in missing dependencies that other users find as well as they install / upgrade.