Debugger fails to install in Rubymine 2016.3.1 with Ruby 2.2.6

I just upgraded my Rubymine to 2016.3.1 and I can't get the debugger to work. I've looked at all of the available posts on this subject and the advice there doesn't seem to help. I can install debase and ruby-debug-ide just fine:

Alan-mbp2: ~/git_projects/constraints_theory +[master]
🚀 gem install ruby-debug-ide --pre
Fetching: ruby-debug-ide-0.6.1.beta4.gem (100%)
Building native extensions. This could take a while...
Successfully installed ruby-debug-ide-0.6.1.beta4
Parsing documentation for ruby-debug-ide-0.6.1.beta4
Installing ri documentation for ruby-debug-ide-0.6.1.beta4
Done installing documentation for ruby-debug-ide after 1 seconds
1 gem installed

Alan-mbp2: ~/git_projects/constraints_theory +[master]
🚀 gem install debase --pre
Fetching: debase-ruby_core_source-0.9.6.gem (100%)
Successfully installed debase-ruby_core_source-0.9.6
Fetching: debase-0.2.2.beta10.gem (100%)
Building native extensions. This could take a while...
Successfully installed debase-0.2.2.beta10
Parsing documentation for debase-ruby_core_source-0.9.6
Installing ri documentation for debase-ruby_core_source-0.9.6
Parsing documentation for debase-0.2.2.beta10
Installing ri documentation for debase-0.2.2.beta10
Done installing documentation for debase-ruby_core_source, debase after 18 seconds
2 gems installed

Alan-mbp2: ~/git_projects/constraints_theory +[master]
🚀 ruby -v
ruby 2.2.6p396 (2016-11-15 revision 56800) [x86_64-darwin15]

I've uninstalled all the debug gems and re-installed them and still can't get the debugger to install. Previously I was trying to do this on Ruby 2.2.4 with the same results. Then I upgraded to ruby 2.2.6 with the same results. 

Here is the output from the log file when I attempt to install the debugger from the UI:

2017-02-11 16:27:45,963 [1250158] INFO - .ruby.ruby.run.RubyCommandLine - Executing [/Users/abaird/.rubies/ruby-2.2.6/bin/ruby -x /Users/abaird/.rubies/ruby-2.2.6/bin/gem --version], working dir =[/Users/abaird/.rubies/ruby-2.2.6/bin]
2017-02-11 16:27:47,494 [1251689] INFO - ails.preload.spring.SpringUtil - Moving Spring to /private/var/folders/4r/qv6l3srs4s3gzxln2j8xpx8h0000gn/T/RMSpring
2017-02-11 16:27:47,494 [1251689] INFO - .ruby.ruby.run.RubyCommandLine - Executing [/Users/abaird/.rubies/ruby-2.2.6/bin/ruby -x /Users/abaird/.rubies/ruby-2.2.6/bin/gem install debase-0.2.2.beta9.gem --no-rdoc --no-ri --user-install], working dir =[/Applications/RubyMine.app/Contents/rb/gems]
2017-02-11 16:27:54,205 [1258400] INFO - lugins.ruby.gem.GemInstallUtil - Installed gem: /Applications/RubyMine.app/Contents/rb/gems/debase-0.2.2.beta9.gem
2017-02-11 16:27:54,206 [1258401] INFO - ails.preload.spring.SpringUtil - Moving Spring to /private/var/folders/4r/qv6l3srs4s3gzxln2j8xpx8h0000gn/T/RMSpring
2017-02-11 16:27:54,206 [1258401] INFO - .ruby.ruby.run.RubyCommandLine - Executing [/Users/abaird/.rubies/ruby-2.2.6/bin/ruby -x /Users/abaird/.rubies/ruby-2.2.6/bin/gem --version], working dir =[/Users/abaird/.rubies/ruby-2.2.6/bin]
2017-02-11 16:27:54,532 [1258727] INFO - ails.preload.spring.SpringUtil - Moving Spring to /private/var/folders/4r/qv6l3srs4s3gzxln2j8xpx8h0000gn/T/RMSpring
2017-02-11 16:27:54,532 [1258727] INFO - .ruby.ruby.run.RubyCommandLine - Executing [/Users/abaird/.rubies/ruby-2.2.6/bin/ruby -x /Users/abaird/.rubies/ruby-2.2.6/bin/gem install ruby-debug-ide-0.6.1.beta3.gem --no-rdoc --no-ri --user-install], working dir =[/Applications/RubyMine.app/Contents/rb/gems]
2017-02-11 16:27:57,514 [1261709] INFO - lugins.ruby.gem.GemInstallUtil - Installed gem: /Applications/RubyMine.app/Contents/rb/gems/ruby-debug-ide-0.6.1.beta3.gem
2017-02-11 16:27:57,649 [1261844] INFO - tion.impl.ExecutionManagerImpl - Cannot start debugger. Gem 'ruby-debug-ide' isn't installed or its executable script 'rdebug-ide' doesn't exist.
com.intellij.execution.ExecutionException: Cannot start debugger. Gem 'ruby-debug-ide' isn't installed or its executable script 'rdebug-ide' doesn't exist.
at org.jetbrains.plugins.ruby.ruby.run.configuration.RubyAbstractCommandLineState$RubyDebugCommandLineDataBuilderBase.<init>(RubyAbstractCommandLineState.java:381)
at org.jetbrains.plugins.ruby.ruby.run.configuration.RubyAbstractCommandLineState.a(RubyAbstractCommandLineState.java:208)
at org.jetbrains.plugins.ruby.ruby.run.configuration.RubyAbstractCommandLineState.createDefaultCommandLine(RubyAbstractCommandLineState.java:172)
at org.jetbrains.plugins.ruby.testing.rspec.run.RSpecRunCommandLineState.createRunCommandLine(RSpecRunCommandLineState.java:78)
at org.jetbrains.plugins.ruby.ruby.run.configuration.RubyAbstractCommandLineState.createCommandLineAndProcessHandler(RubyAbstractCommandLineState.java:98)
at org.jetbrains.plugins.ruby.ruby.debugger.RubyDebugRunner$RubyDebugSessionBuilder.<init>(RubyDebugRunner.java:202)
at org.jetbrains.plugins.ruby.ruby.debugger.RubyDebugRunner.doExecute(RubyDebugRunner.java:65)
at com.intellij.execution.runners.GenericProgramRunner$1.execute(GenericProgramRunner.java:43)
at com.intellij.execution.impl.ExecutionManagerImpl.a(ExecutionManagerImpl.java:381)
at com.intellij.openapi.application.TransactionGuardImpl.a(TransactionGuardImpl.java:91)
at com.intellij.openapi.application.TransactionGuardImpl.access$300(TransactionGuardImpl.java:41)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:116)
at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:126)
at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:122)
at com.intellij.execution.impl.ExecutionManagerImpl.a(ExecutionManagerImpl.java:438)
at com.intellij.execution.impl.ExecutionManagerImpl.compileAndRun(ExecutionManagerImpl.java:293)
at com.intellij.execution.impl.ExecutionManagerImpl.startRunProfile(ExecutionManagerImpl.java:438)
at com.intellij.execution.runners.GenericProgramRunner.execute(GenericProgramRunner.java:40)
at com.intellij.execution.runners.BaseProgramRunner.execute(BaseProgramRunner.java:61)
at com.intellij.execution.runners.BaseProgramRunner.execute(BaseProgramRunner.java:50)
at com.intellij.execution.ProgramRunnerUtil.executeConfiguration(ProgramRunnerUtil.java:118)
at com.intellij.execution.impl.ExecutionManagerImpl.a(ExecutionManagerImpl.java:118)
at com.intellij.execution.impl.ExecutionManagerImpl.access$300(ExecutionManagerImpl.java:68)
at com.intellij.execution.impl.ExecutionManagerImpl$3.run(ExecutionManagerImpl.java:530)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:223)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:387)
at com.intellij.openapi.application.TransactionGuardImpl$6.run(TransactionGuardImpl.java:318)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:417)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:401)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.a(IdeEventQueue.java:843)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:679)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:391)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
2017-02-11 16:27:58,125 [1262320] INFO - ails.preload.spring.SpringUtil - Moving Spring to /private/var/folders/4r/qv6l3srs4s3gzxln2j8xpx8h0000gn/T/RMSpring
2017-02-11 16:27:58,125 [1262320] INFO - .ruby.ruby.run.RubyCommandLine - Executing [/Users/abaird/.rubies/ruby-2.2.6/bin/ruby -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /Users/abaird/.gem/ruby/2.1.2/bin/bundle check], working dir =[/Users/abaird/git_projects/constraints_theory]

I'm running the following version of Rubymine:

RubyMine 2016.3.1
Build #RM-163.9166.34, built on December 15, 2016
JRE: 1.8.0_112-release-408-b6 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o