Can't access content server locally or remotely?

lobster1010 · 01-28-2025, 02:20 AM

As title says, can't access my calibre content server through 127.0.0.1:8080 on the same pc calibre is installed in or on any other devices through my IP. I just get:

This page isn’t working

127.0.0.1 sent an invalid response.

ERR_INVALID_HTTP_RESPONSE

Not sure how to fix it, any advice is welcome

theducks · 01-28-2025, 07:39 AM

Did a PING. 127 seems to be blocked on my PC (w10).
Ping finds 10.0.0.21

What OS? What A/V (it may be set too aggressive for your needs)

lobster1010 · 01-28-2025, 08:17 AM

Quote:

Originally Posted by theducks

Did a PING. 127 seems to be blocked on my PC (w10).
Ping finds 10.0.0.21

What OS? What A/V (it may be set too aggressive for your needs)

Thank you for the reply. 10.0.0.21 doesn't do anything either.

I'm on Windows 11. What does A/V mean? Sorry i'm very new to all of this.

theducks · 01-28-2025, 12:20 PM

Quote:

Originally Posted by lobster1010

Thank you for the reply. 10.0.0.21 doesn't do anything either.

I'm on Windows 11. What does A/V mean? Sorry i'm very new to all of this.

10.0.0.21 IS MY (LAN IP) SERVER (behind a firewall). Yours will most likely be different.
Click the Globe with 3 orbs icon (BTW the orbs are green when the server is running). That will tell you your CURRENT IP and port (it can change over time unless you take additional steps)
Anti Virus (suite). Windows Defender is fine. Don't fall for all the F.U.D. the ads use.

lobster1010 · 01-28-2025, 02:41 PM

Oh I see sorry.

The three orbs are green, and I've tried connecting via the ip and port shown when i click on those but that doesnt work either.

Yes its just windows defender. Ive tried turning it off and accessing the ip as suggested in the calibre official guide but this does nothing either.

DNSB · 01-28-2025, 04:38 PM

Have you tried turning off the firewall?

lobster1010 · 01-28-2025, 04:48 PM

Yes I've tried turning off the firewall, doesn't seem to help

theducks · 01-28-2025, 06:31 PM

Is your server WIRED or wireless?
Is the test device on the same WiFi band as the server (if server is wireless)

Is you W11 network set to PRIVATE

Is your router set to block wireless TO wired?

kovidgoyal · 01-28-2025, 08:01 PM

Are you sure it's running on port 8080? I suggest rebooting in safe mode with networking then trying it, that eliminates a whole host of possible things that could be interfering.

lobster1010 · 01-28-2025, 09:01 PM

After rebooting in safe mode and back to normal it works perfectly. No idea why but thank you so much!!

DNSB · 01-28-2025, 11:23 PM

Quote:

Originally Posted by lobster1010

After rebooting in safe mode and back to normal it works perfectly. No idea why but thank you so much!!

That seems to have worked for other people as well. Just hit the patient in the head with an axe and see if they recover.

01-28-2025, 02:20 AM	#1
lobster1010 Junior Member Posts: 5 Karma: 10 Join Date: Jan 2025 Device: Kindle Keyboard	Can't access content server locally or remotely? As title says, can't access my calibre content server through 127.0.0.1:8080 on the same pc calibre is installed in or on any other devices through my IP. I just get: This page isn’t working 127.0.0.1 sent an invalid response. ERR_INVALID_HTTP_RESPONSE Not sure how to fix it, any advice is welcome

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01-28-2025, 07:39 AM	#2
theducks Well trained by Cats Posts: 31,047 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Did a PING. 127 seems to be blocked on my PC (w10). Ping finds 10.0.0.21 What OS? What A/V (it may be set too aggressive for your needs)

01-28-2025, 02:41 PM	#5
lobster1010 Junior Member Posts: 5 Karma: 10 Join Date: Jan 2025 Device: Kindle Keyboard	Oh I see sorry. The three orbs are green, and I've tried connecting via the ip and port shown when i click on those but that doesnt work either. Yes its just windows defender. Ive tried turning it off and accessing the ip as suggested in the calibre official guide but this does nothing either.

01-28-2025, 04:38 PM	#6
DNSB Bibliophagist Posts: 46,168 Karma: 168983734 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Have you tried turning off the firewall?

01-28-2025, 04:48 PM	#7
lobster1010 Junior Member Posts: 5 Karma: 10 Join Date: Jan 2025 Device: Kindle Keyboard	Yes I've tried turning off the firewall, doesn't seem to help

01-28-2025, 06:31 PM	#8
theducks Well trained by Cats Posts: 31,047 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Is your server WIRED or wireless? Is the test device on the same WiFi band as the server (if server is wireless) Is you W11 network set to PRIVATE Is your router set to block wireless TO wired?

01-28-2025, 08:01 PM	#9
kovidgoyal creator of calibre Posts: 45,345 Karma: 27182818 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Are you sure it's running on port 8080? I suggest rebooting in safe mode with networking then trying it, that eliminates a whole host of possible things that could be interfering.

01-28-2025, 09:01 PM	#10
lobster1010 Junior Member Posts: 5 Karma: 10 Join Date: Jan 2025 Device: Kindle Keyboard	After rebooting in safe mode and back to normal it works perfectly. No idea why but thank you so much!!

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