Keepassxc: KeePassXC-Browser "Key exchange was not successful."

[d2uriel]

Hey there,

I've been using KeePass portable v2.3.4 and it was working fine until I decided to follow the upgrade recommendation that KeePassXC-Browser plugin was showing. I upgraded to KeePassXC v2.4.1. Now, when I click on the addon icon it shows a message:

Cannot connect to KeePassXC. Check that browser integration is enabled in KeePassXC settings.

After clicking the Reload button twice a different message pops up:

Key exchange was not successful.

I'm unable to use KeePassXC-Browser now because of that.

Expected Behavior

KeePassXC-Browser should connect to KeePassXC.

Current Behavior

I get these two messages from KeePassXC-Browser:
Cannot connect to KeePassXC. Check that browser integration is enabled in KeePassXC settings.

Key exchange was not successful.

Possible Solution

No idea.

Steps to Reproduce

I don't have a second computer to try it out. What I have already tried so far is:

1. Downgraded to KeePassXC v2.3.4 (removed to whole KeePassXC folder and extracted the portable version from the original archive) - same problem.
2. Created a new DB - same problem. I'm using a password protected DB, not a key file.
3. Uninstalled Firefox and installed it again (fresh addon installation, etc.) - same problem.
4. Tried KeePassXC-2.5.0-snapshot - same problem.

Firefox v66.0.4 (64-bit)

Debug Info

KeePassXC - Version 2.4.1
Revision: 7bafe65

Qt 5.12.2
Debugging mode is disabled.

Operating system: Windows 10 (10.0)
CPU architecture: x86_64
Kernel: winnt 10.0.17134

Enabled extensions:
- Auto-Type
- Browser Integration
- SSH Agent
- KeeShare (signed and unsigned sharing)
- YubiKey

Cryptographic libraries:
 libgcrypt 1.8.4

Thank you in advance for any suggestions that might help solve the problem.

Daniel.


debug_info_v2.4.1.txt
debug_info_v2.5.txt

[d2uriel]

Problem solved. I renamed to folder... and there registry key

HKEY_CURRENT_USER\\Software\\Mozilla\\NativeMessagingHosts\\

pointed to a wrong path. Sorry for trouble and thanks to varjolintu for pointing me to Troubleshooting Guide (missed it somehow).

[Berulon]

hi there
for my the exact same problem but
HKEY_CURRENT_USER\Software\Mozilla\NativeMessagingHosts\
there was no entry for KeePassXC