Kill the build server, run it again and post the text that it outputs when it starts.
Build server version: 7.2
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2021-03-03 01:58:47.748:INFO::main: Logging initialized @295ms to org.eclipse.jetty.util.log.StdErrLog
Loading default configuration file.
AppPath=/Users/georgegeorgiadis/Desktop/B4iBuildServer
Mac version: 10.16
Xcode path: /Applications/Xcode.app/Contents/Developer
Xcode version: 12.4
2021-03-03 01:58:53.367:INFO
ejs.Server:main: jetty-9.4.z-SNAPSHOT; built: 2018-05-03T15:56:21.710Z; git: daa59876e6f384329b122929e70a80934569428c; jvm 1.8.0_281-b09
2021-03-03 01:58:53.412:INFO
ejs.session:main: DefaultSessionIdManager workerName=node0
2021-03-03 01:58:53.412:INFO
ejs.session:main: No SessionScavenger set, using defaults
2021-03-03 01:58:53.414:INFO
ejs.session:main: node0 Scavenging every 660000ms
2021-03-03 01:58:53.425:INFO
ejsh.ContextHandler:main: Started o.e.j.s.ServletContextHandler@4b952a2d{/,file:///Users/georgegeorgiadis/Desktop/B4iBuildServer/www,AVAILABLE}
2021-03-03 01:58:53.429:INFO
ejs.AbstractNCSARequestLog:main: Opened /Users/georgegeorgiadis/Desktop/B4iBuildServer/logs/b4j-2021_03_02.request.log
2021-03-03 01:58:53.454:INFO
ejs.AbstractConnector:main: Started ServerConnector@20398b7c{HTTP/1.1,[http/1.1]}{0.0.0.0:51041}
2021-03-03 01:58:53.484:INFO
ejus.SslContextFactory:main: x509=X509@335eadca(rootca,h=[],w=[]) for SslContextFactory@210366b4[provider=null,keyStore=file:///Users/georgegeorgiadis/Desktop/B4iBuildServer/key/key.jks,trustStore=null]
2021-03-03 01:58:53.484:INFO
ejus.SslContextFactory:main: x509=X509@eec5a4a(jetty,h=[10.37.129.2],w=[]) for SslContextFactory@210366b4[provider=null,keyStore=file:///Users/georgegeorgiadis/Desktop/B4iBuildServer/key/key.jks,trustStore=null]
2021-03-03 01:58:53.667:INFO
ejs.AbstractConnector:main: Started ServerConnector@6ee12bac{SSL,[ssl, http/1.1]}{0.0.0.0:51042}
2021-03-03 01:58:53.668:INFO
ejs.Server:main: Started @6219ms
Build server is ready
Build server version: 7.20