Connection failed after upgrade to 4.0.2

[Zathras42]

Describe the bug
Upgraded from 4.0.0 to 4.0.2
No longer works.
Error message: "Connection failed"

To Reproduce
Upgrade or install 4.0.2

Expected behavior
Extension to log in to pihole and work..

Desktop (please complete the following information):

• OS: Win 10
• Browser Firefox
• Version 135.0.1 (64-bit)

Additional context
Add any other context about the problem here.

[joejsullivan]

i had the same issue suddenly on 4.0.0. Don't understand why - two different computers both stopped working. All the PiHole info was gone from the settings.

[Zathras42]

Possibly caused by "API seats exceeded increase webserver.api.max_sessions" error.

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again.

From reddit post: https://www.reddit.com/r/pihole/comments/1ivkr68/api_seats_exceeded/
Number of concurrent sessions allowed for the API. If the number of sessions exceeds this value, no new sessions will be allowed until the number of sessions drops due to session expiration or logout. Note that the number of concurrent sessions is irrelevant if authentication is disabled as no sessions are used in this case.

[joejsullivan]

In my case- I'm not using 6, this is still 5.

[gonsaaa]

I'm on version 5.18.4 and it also stopped working.
Interesting is that the fields show pihole address and password (instead of API)

[Blugoo]

Same issue since the March 1st update to v4.0.0 in FireFox 115.20.0esr (64 bits).
Thanks in advance and best regards.

[upD8R]

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again.

This is the solution, thanks for pointing out.

To the Pi-Hole v5 users: The extension dropped v5 support starting with release 4.0.0. Also mentioned here.

[badsgahhl]

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again.

This is the solution, thanks for pointing out.

To the Pi-Hole v5 users: The extension dropped v5 support starting with release 4.0.0. Also mentioned here.

Setting max_sessions should only be needed prior to 4.0.2. The extension unfortunately opened too many sessions. If you already have 4.0.2 you can try to clear all active sessions by changing the password of pihole (just use the same password as before)

sudo pihole setpassword

[simi55]

Weird - 4.02 is working in Edge while 4.02 in Firefox (135.0) is not. I copied URL and password.

[Zathras42]

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again.

This is the solution, thanks for pointing out.
To the Pi-Hole v5 users: The extension dropped v5 support starting with release 4.0.0. Also mentioned here.

Setting max_sessions should only be needed prior to 4.0.2. The extension unfortunately opened too many sessions. If you already have 4.0.2 you can try to clear all active sessions by changing the password of pihole (just use the same password as before)

sudo pihole setpassword

A better way to clear sessions is navigate to Settings - Web Interface - API Settings, switch to expert mode then look at 'Currently active sessions'. From there, you can delete extraneous sessions.

[jdrch]

jfc we have to get the devs to stop this API madness. It can't be that updating - a good move for security - screws the rest of the user ecosystem. We all have enough things in our lives to worry about.

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again

Do you also have to restart pi-hole after this?

[Zathras42]

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again

Do you also have to restart pi-hole after this?

No restart required.
Try the web UI first as mentioned in my previous post.

[jdrch]

Went into /etc/pihole/pihole.toml, set 'webserver.api.max_sessions' to a higher value and all working again

Do you also have to restart pi-hole after this?

No restart required. Try the web UI first as mentioned in my previous post.

Thanks, I did the config file update and then checked the web UI. It says I have only 2 sessions, so now I"m really confused as to waht the problem might be.