java.lang.NullPointerException崩溃

[evronemilsk]

com.youzanyun.open.mobile:x5sdk:7.1.15 版本出现大量的崩溃

main(1)

java.lang.NullPointerException
Attempt to invoke virtual method 'boolean com.youzan.androidsdk.WebViewCompat.validPreviousUrl()' on a null object reference
Caused by:
java.lang.NullPointerException:Attempt to invoke virtual method 'boolean com.youzan.androidsdk.WebViewCompat.validPreviousUrl()' on a null object reference
com.youzan.androidsdk.tool.WebParameter.validPreviousUrl(WebParameter.java:1)
com.youzan.androidsdkx5.YouzanBrowser.pageCanGoBack(YouzanBrowser.java:3)