Page block can not be synchronized, ssh suggested error

[zhq1]

root@vultr:~/explorer# npm start

explorer@1.6.1 start /root/explorer
node --stack-size=10000 ./bin/cluster

Starting cluster with pid: 6050
GET / 200 739ms - 8.48kb
GET /vendor/jqplot/jquery.jqplot.css 304 2ms
GET /themes/Yeti/bootstrap.min.css 304 2ms
GET /stylesheets/style.css 304 1ms
GET /vendor/jqplot/jquery.jqplot.min.js 304 0ms
GET /vendor/jqplot/plugins/jqplot.dateAxisRenderer.min.js 304 0ms
GET /vendor/jqplot/plugins/jqplot.ohlcRenderer.min.js 304 0ms
GET /vendor/jqplot/plugins/jqplot.highlighter.min.js 304 0ms
GET /vendor/jqplot/plugins/jqplot.pieRenderer.min.js 304 1ms
GET /vendor/jqplot/plugins/jqplot.barRenderer.min.js 304 0ms
GET /vendor/jqplot/plugins/jqplot.categoryAxisRenderer.min.js 304 1ms
GET /javascripts/chart.js 304 0ms
GET /images/logo.png 304 0ms
GET /themes/fonts/glyphicons-halflings-regular.woff2 304 0ms
GET /api/getdifficulty 200 5ms - 7b
{ [Error: Method not found] code: -32601 }

[erfan007p]

you may have to look your settings.json again
RPC_METHOD_NOT_FOUND = -32601