Error when compiling the example

[librarymark]

When I try to compile the example, I get this error:

In file included from /home/mark/Arduino/libraries/WebSerial/src/WebSerial.h:20:0, from /home/mark/Arduino/libraries/WebSerial/examples/Demo/Demo.ino:19: /home/mark/Arduino/libraries/WebSerial/src/webserial_webpage.h:1915:1: error: scalar object 'WEBSERIAL_HTML' requires one element in initializer }; ^