Hello, 馃憢
first of all, I would like to thank the OpenMouse's Developer team for this amazing, free and open-source website. Not requiring special software should be a standard for any modern day peripheral. 鉂わ笍
WARNING: There might be a simpler, easier and safer way of doing this, but this one worked for me. If you know or find any simpler way, please let me know and/or create your own issue.
If you're on Linux and you're having a problem, where you can see the mouse, pair it, but it fails to open, then one possible issue could be missing permissions.
1. Check chrome://device-log/, filter for HID events and look for something like this:

This might also help you find other issues.
2. When you identify that this is your issue, you can check if the files have the right permission. Example of root-only access:
ls -l /dev/hidraw3 /dev/hidraw4 /dev/hidraw5

Your device might have different indexes.
3. If you are missing access, you can simply add yourself to read and write with setfacl. Example for my issue:
sudo setfacl -m u:$USER:rw /dev/hidraw3
sudo setfacl -m u:$USER:rw /dev/hidraw4
sudo setfacl -m u:$USER:rw /dev/hidraw5
4. If you run the ls command from step 1 again, you should now see you have read and write access.

5. Done. Try OpenMouse now. 馃憤
Hello, 馃憢
first of all, I would like to thank the OpenMouse's Developer team for this amazing, free and open-source website. Not requiring special software should be a standard for any modern day peripheral. 鉂わ笍
WARNING: There might be a simpler, easier and safer way of doing this, but this one worked for me. If you know or find any simpler way, please let me know and/or create your own issue.
If you're on Linux and you're having a problem, where you can see the mouse, pair it, but it fails to open, then one possible issue could be missing permissions.
1. Check

chrome://device-log/, filter for HID events and look for something like this:This might also help you find other issues.
2. When you identify that this is your issue, you can check if the files have the right permission. Example of root-only access:

ls -l /dev/hidraw3 /dev/hidraw4 /dev/hidraw5Your device might have different indexes.
3. If you are missing access, you can simply add yourself to read and write with
setfacl. Example for my issue:sudo setfacl -m u:$USER:rw /dev/hidraw3sudo setfacl -m u:$USER:rw /dev/hidraw4sudo setfacl -m u:$USER:rw /dev/hidraw54. If you run the

lscommand from step 1 again, you should now see you have read and write access.5. Done. Try OpenMouse now. 馃憤