Cannot install The .json

Don't know a ton about coding but on mac and been able to do almost everything else so far, except I have had this issue

>Error downloading https://raw.githubusercontent.com/SpacehuhnTech/arduino/main/package_spacehuhn_index.json Error downloading https://github.com/esp8266/Arduino/releases/download/2.0.0/esp8266-2.0.0.zip java.lang.RuntimeException: java.lang.Exception: Error downloading https://github.com/esp8266/Arduino/releases/download/2.0.0/esp8266-2.0.0.zip at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onInstallPressed$2(ContributionManagerUI.java:175) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.Exception: Error downloading https://github.com/esp8266/Arduino/releases/download/2.0.0/esp8266-2.0.0.zip at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:149) at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:83) at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:60) at cc.arduino.contributions.packages.ContributionInstaller.install(ContributionInstaller.java:105) at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onInstallPressed$2(ContributionManagerUI.java:172) ... 1 more 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 at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1959) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302) at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1514) at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026) at sun.security.ssl.Handshaker.process_record(Handshaker.java:961) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072) at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397) at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185) at sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2701) at sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2623) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1806) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474) at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338) at cc.arduino.utils.network.HttpConnectionManager.makeConnection(HttpConnectionManager.java:156) at cc.arduino.utils.network.HttpConnectionManager.makeConnection(HttpConnectionManager.java:106) at cc.arduino.utils.network.FileDownloader.openConnectionAndFillTheFile(FileDownloader.java:234) at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:182) at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:129) at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:147) ... 5 more Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:397) at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:302) at sun.security.validator.Validator.validate(Validator.java:260) at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324) at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229) at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124) at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1496) ... 26 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:392) ... 32 more

Wondering if anyone had any advice. Also the only port, serial or otherwise on my mac is a Bluetooth one. Should I use a different computer or is there another solution.

BTW this is a school macbook that I don't have admin access too, I could get the passcode if it is needed, school keeps all passwords on local server accessible with a LAN to USB cable. I have an iMac that I own with no admin restrictions if I need to swap to that.

Anything helps, thanks.

The report names ContributionManagerUI.java, DownloadableContributionsDownloader.java, FileDownloader.java, and HttpConnectionManager.java, along with the failing download URLs. Start by tracing that download path and reproducing the SSLHandshakeException; clarify the affected environment and expected fix before defining what completion means.

Written by the indexing model from the issue text.