MUMBAI_INDIAN

I am getting this exact issue and have tried all the fixes that failed for you garon and it still doesn't seem to work, did you manage to find a fix?

I have been experiencing issues related to launching my modpacks, they are appearing offline and when I try to install them it pops up with a message saying "the modpack is corrupt and is not available for offline play." even though I am online. can someone please help solve my issue. Error code: [B#753] net.technicpack.rest.RestfulAPIException: Error accessing URL [https://solder.mc-complex.com/api/modpack] [B#753] at net.technicpack.rest.RestObject.getRestObject(RestObject.java:77) [B#753] at net.technicpack.solder.http.HttpSolderApi.getMirrorUrl(HttpSolderApi.java:57) [B#753] at net.technicpack.solder.cache.CachedSolderApi.getMirrorUrl(CachedSolderApi.java:134) [B#753] at net.technicpack.platform.PlatformPackInfoRepository.getInfoFromPlatformInfo(PlatformPackInfoRepository.java:72) [B#753] at net.technicpack.platform.PlatformPackInfoRepository.getPlatformPackInfo(PlatformPackInfoRepository.java:60) [B#753] at net.technicpack.platform.PlatformPackInfoRepository.getPackInfo(PlatformPackInfoRepository.java:46) [B#753] at net.technicpack.launchercore.modpacks.PackLoadJob$5.run(PackLoadJob.java:180) [B#753] at java.lang.Thread.run(Unknown Source) [B#753] Caused by: 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 [B#753] at sun.security.ssl.Alerts.getSSLException(Unknown Source) [B#753] at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source) [B#753] at sun.security.ssl.Handshaker.fatalSE(Unknown Source) [B#753] at sun.security.ssl.Handshaker.fatalSE(Unknown Source) [B#753] at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source) [B#753] at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source) [B#753] at sun.security.ssl.Handshaker.processLoop(Unknown Source) [B#753] at sun.security.ssl.Handshaker.process_record(Unknown Source) [B#753] at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source) [B#753] at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source) [B#753] at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source) [B#753] at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source) [B#753] at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source) [B#753] at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source) [B#753] at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source) [B#753] at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) [B#753] at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source) [B#753] at net.technicpack.rest.RestObject.getRestObject(RestObject.java:56) [B#753] ... 7 more [B#753] Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target [B#753] at sun.security.validator.PKIXValidator.doBuild(Unknown Source) [B#753] at sun.security.validator.PKIXValidator.engineValidate(Unknown Source) [B#753] at sun.security.validator.Validator.validate(Unknown Source) [B#753] at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source) [B#753] at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source) [B#753] at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source) [B#753] ... 21 more [B#753] Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target [B#753] at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source) [B#753] at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source) [B#753] at java.security.cert.CertPathBuilder.build(Unknown Source) [B#753] ... 27 more