Error Check logs

[samurai1i]

[21:32:43] [Thread-112/INFO]: [CHAT] §cDungeon Rooms: An error has occured. See logs for more details.
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.http.HttpURLConnection.access$200(HttpURLConnection.java:90)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1433)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1431)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at java.security.AccessController.doPrivileged(Native Method)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at java.security.AccessController.doPrivilegedWithCombiner(AccessController.java:782)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1430)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at java.net.URL.openStream(URL.java:1045)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at io.github.quantizr.dungeonrooms.DungeonRooms.lambda$onServerConnect$8(DungeonRooms.java:236)
[21:32:43] [Thread-112/INFO]: [io.github.quantizr.dungeonrooms.DungeonRooms:lambda$onServerConnect$8:247]: at java.lang.Thread.run(Thread.java:745)
[21:32:43] [Thread-112/INFO]: [java.lang.Throwable:printStackTrace:634]: Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

This is showing up every time I launch. I belivee it is a problem with downloading or accessing the certification. Any possible fixes / download processes? Thanks. PS all of my other mods accessing Api's are working just fine.