Forge Installation Error - "Unable to find valid certification path to requested target"

[QwertyMan]

Hello,

I wanted to install Forge for 1.18.2, so I headed to the forge website and downloaded the recommended version (40.1.0)
But when I open the .jar file and click on "Install Client" it starts downloading normally and then displays this error message:

Failed to run processor: javax.net.ssl.SSLHandshakeException:sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

I have tried to update Java and reinstall it but nothing worked (I have Java 8 update 333)
I have also tried installing the latest Forge version (40.1.53) but it keeps displaying the same message.

Does somebody know how to fix that?
Thanks

[QwertyMan]

2 minutes ago, diesieben07 said:

Post the contents of %windir%\system32\drivers\etc\hosts (Windows) or /etc/hosts (Mac, Linux).

Nevermind I fixed it
Thanks anyway

[rxguer]

How did you fix it?

[pixelcraze345]

I'm having the same issue and haven't found any help, though I check the file mentioned, its attached below

 

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#    127.0.0.1       localhost
#    ::1             localhost

[warjort]

Make sure you have a recent version of java installed.

[pixelcraze345]

22 minutes ago, warjort said:

Make sure you have a recent version of java installed.

This worked, Thank you! I was running Java 8 Update 51 before, but updating to current fixed the issue.

[supercreeper]

here is the file you mentioned

# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample LMHOSTS file used by the Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to computernames
# (NetBIOS) names.  Each entry should be kept on an individual line.
# The IP address should be placed in the first column followed by the
# corresponding computername. The address and the computername
# should be separated by at least one space or tab. The "#" character
# is generally used to denote the start of a comment (see the exceptions
# below).
#
# This file is compatible with Microsoft LAN Manager 2.x TCP/IP lmhosts
# files and offers the following extensions:
#
#      #PRE
#      #DOM:<domain>
#      #INCLUDE <filename>
#      #BEGIN_ALTERNATE
#      #END_ALTERNATE
#      \0xnn (non-printing character support)
#
# Following any entry in the file with the characters "#PRE" will cause
# the entry to be preloaded into the name cache. By default, entries are
# not preloaded, but are parsed only after dynamic name resolution fails.
#
# Following an entry with the "#DOM:<domain>" tag will associate the
# entry with the domain specified by <domain>. This affects how the
# browser and logon services behave in TCP/IP environments. To preload
# the host name associated with #DOM entry, it is necessary to also add a
# #PRE to the line. The <domain> is always preloaded although it will not
# be shown when the name cache is viewed.
#
# Specifying "#INCLUDE <filename>" will force the RFC NetBIOS (NBT)
# software to seek the specified <filename> and parse it as if it were
# local. <filename> is generally a UNC-based name, allowing a
# centralized lmhosts file to be maintained on a server.
# It is ALWAYS necessary to provide a mapping for the IP address of the
# server prior to the #INCLUDE. This mapping must use the #PRE directive.
# In addtion the share "public" in the example below must be in the
# LanManServer list of "NullSessionShares" in order for client machines to
# be able to read the lmhosts file successfully. This key is under
# \machine\system\currentcontrolset\services\lanmanserver\parameters\nullsessionshares
# in the registry. Simply add "public" to the list found there.
#
# The #BEGIN_ and #END_ALTERNATE keywords allow multiple #INCLUDE
# statements to be grouped together. Any single successful include
# will cause the group to succeed.
#
# Finally, non-printing characters can be embedded in mappings by
# first surrounding the NetBIOS name in quotations, then using the
# \0xnn notation to specify a hex value for a non-printing character.
#
# The following example illustrates all of these extensions:
#
# 102.54.94.97     rhino         #PRE #DOM:networking  #net group's DC
# 102.54.94.102    "appname  \0x14"                    #special app server
# 102.54.94.123    popular            #PRE             #source server
# 102.54.94.117    localsrv           #PRE             #needed for the include
#
# #BEGIN_ALTERNATE
# #INCLUDE \\localsrv\public\lmhosts
# #INCLUDE \\rhino\public\lmhosts
# #END_ALTERNATE
#
# In the above example, the "appname" server contains a special
# character in its name, the "popular" and "localsrv" server names are
# preloaded, and the "rhino" server name is specified so it can be used
# to later #INCLUDE a centrally maintained lmhosts file if the "localsrv"
# system is unavailable.
#
# Note that the whole file is parsed including comments on each lookup,
# so keeping the number of comments to a minimum will improve performance.
# Therefore it is not advisable to simply add lmhosts file entries onto the
# end of this file.

51.68.172.243 authserver.mojang.com
51.68.172.243 sessionserver.mojang.com
51.68.172.243 launchermeta.mojang.com
 

[supercreeper]

plz help me fix this issue

 

[warjort]

Remove those invalid entries from your hosts file then restart windows and try again.

[supercreeper]

which invalid entries

[warjort]

The ones that were added by the dodgy software you downloaded

that redirect your network requests away from mojang's site to who knows where? 

Quote

51.68.172.243 authserver.mojang.com
51.68.172.243 sessionserver.mojang.com
51.68.172.243 launchermeta.mojang.com
 

There are no other entries in your hosts file.

[supercreeper]

so i need to delete all three of them

 

[supercreeper]

i fix the  issue  anyway

thanks

Edited September 20, 2022 by supercreeper

[Lightstream]

Fixed

Edited December 7, 2022 by Lightstream

[Callan Nichols]

I've been having (maybe) a similar issue, most of the text is the same except it says "Failed to resolve meta data" beforehand. Updated Java, reinstalled MC and CF multiple times, restarted PC. You're my latest hope, but it looks empty. sorry if this is considered necroing.

 

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
#    127.0.0.1       localhost
#    ::1             localhost
 

Edited March 12, 2023 by Callan Nichols
Added info

[Powerful845tiger]

Please make a new thread about the issue. Don't post on old threads or any other thread even if your issue might be similar