Intellij IDEA 2017.1.5 connection times out during plugin installation

I have a problem with my IDE. It does not want to neither update or install any plugins (but it allows me to register my licence and browse through every plugin). It gives me a notification:

Connection failed (Read timed out). Please check network connection and try again

I looked into a log file and here what's there is:

> 2017-07-12 19:32:41,687 [ 653407]   INFO -
> .script.IdeScriptEngineManager - javax.script.ScriptEngineManager
> initialized in 2327 ms  2017-07-12 19:33:50,610 [ 722330]   WARN -
> Settings.impl.PluginDownloader - Cannot download
> 'https://plugins.jetbrains.com/pluginManager/?action=download&id=Lombook+Plugin&build=IU-171.4694.70&uuid=52f34c2e-c3bf-400b-a1c7-d11cc4fdb02b':
> Read timed out  java.io.IOException: Cannot download
> 'https://plugins.jetbrains.com/pluginManager/?action=download&id=Lombook+Plugin&build=IU-171.4694.70&uuid=52f34c2e-c3bf-400b-a1c7-d11cc4fdb02b':
> Read timed out    at
> com.intellij.util.io.HttpRequests$RequestImpl.saveToFile(HttpRequests.java:363)
>   at
> com.intellij.openapi.updateSettings.impl.PluginDownloader$1.process(PluginDownloader.java:245)
>   at
> com.intellij.openapi.updateSettings.impl.PluginDownloader$1.process(PluginDownloader.java:242)
>   at
> com.intellij.util.io.HttpRequests.lambda$doProcess$0(HttpRequests.java:420)
>   at
> com.intellij.util.net.ssl.CertificateManager.runWithUntrustedCertificateStrategy(CertificateManager.java:349)
>   at com.intellij.util.io.HttpRequests.doProcess(HttpRequests.java:420)
>   at com.intellij.util.io.HttpRequests.process(HttpRequests.java:395)
>   at com.intellij.util.io.HttpRequests.access$100(HttpRequests.java:61)
>   at
> com.intellij.util.io.HttpRequests$RequestBuilderImpl.connect(HttpRequests.java:263)
>   at
> com.intellij.openapi.updateSettings.impl.PluginDownloader.a(PluginDownloader.java:242)
>   at
> com.intellij.openapi.updateSettings.impl.PluginDownloader.prepareToInstall(PluginDownloader.java:142)
>   at
> com.intellij.ide.plugins.PluginInstaller.a(PluginInstaller.java:239)
>   at
> com.intellij.ide.plugins.PluginInstaller.a(PluginInstaller.java:131)
>   at
> com.intellij.ide.plugins.PluginInstaller.prepareToInstall(PluginInstaller.java:70)
>   at
> com.intellij.ide.plugins.PluginManagerMain$5.run(PluginManagerMain.java:431)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:726)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:176)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:556)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:501)
>   at
> com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:163)
>   at
> com.intellij.openapi.progress.impl.ProgressManagerImpl$1.run(ProgressManagerImpl.java:137)
>   at
> com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:334)
>   at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>   at java.util.concurrent.FutureTask.run(FutureTask.java:266)     at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>   at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>   at java.lang.Thread.run(Thread.java:745) Caused by:
> java.net.SocketTimeoutException: Read timed out   at
> java.net.SocketInputStream.socketRead0(Native Method)     at
> java.net.SocketInputStream.socketRead(SocketInputStream.java:116)     at
> java.net.SocketInputStream.read(SocketInputStream.java:170)   at
> java.net.SocketInputStream.read(SocketInputStream.java:141)   at
> sun.security.ssl.InputRecord.readFully(InputRecord.java:465)  at
> sun.security.ssl.InputRecord.read(InputRecord.java:503)   at
> sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:973)     at
> sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:930)
>   at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)    at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:246)    at
> java.io.BufferedInputStream.read1(BufferedInputStream.java:286)   at
> java.io.BufferedInputStream.read(BufferedInputStream.java:345)    at
> sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:704)  at
> sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)    at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1536)
>   at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
>   at
> java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
>   at
> sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
>   at
> com.intellij.util.io.HttpRequests.openConnection(HttpRequests.java:511)
>   at com.intellij.util.io.HttpRequests.access$300(HttpRequests.java:61)
>   at
> com.intellij.util.io.HttpRequests$RequestImpl.getConnection(HttpRequests.java:289)
>   at
> com.intellij.util.io.HttpRequests$RequestImpl.getInputStream(HttpRequests.java:298)
>   at
> com.intellij.util.io.HttpRequests$RequestImpl.saveToFile(HttpRequests.java:359)
>   ... 27 more

Does anyone encounter similar problem and know how to solve it?