Exception in thread "Thread-20"

What to do ?
When I perform “Blynk: check for update” with Arduino IDE V 1.8.9
I get these messages:
Downloading ‘https://raw.githubusercontent.com/blynkkk/blynk-library/master/library.properties
… done.
Latest version: 0.6.1
Exception in thread “Thread-20” java.lang.NoClassDefFoundError: cc/arduino/contributions/filters/InstalledPredicate
at com.github.blynk.arduino.tools.BlynkUpdater.lambda$run$0(BlynkUpdater.java:144)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: cc.arduino.contributions.filters.InstalledPredicate
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
… 2 more

Is this ok?
I manualy installed Blynk V0.6.1