Compiling .\contracts\ConvertLib.sol...
Writing artifacts to .\build\contracts

Using network 'shasta'.

Error: Invalid URL provided to HttpProvider
    at new e (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\node_modules\tronweb\dist\webpack:\src\lib\providers\HttpProvider.js:7:19)
    at Object.create (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Provider\index.js:1:1403)
    at Config.get [as provider] (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Config.js:1:6101)
    at C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\node_modules\@truffle\expect\index.js:4:18
    at Array.forEach (<anonymous>)
    at Object.options (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\node_modules\@truffle\expect\index.js:3:19)
    at Object.run (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Migrate\index.js:1:3283)
    at C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\lib\commands\migrate.js:1:1229
    at Object.needsMigrating (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Migrate\index.js:1:6092)
    at runMigrations (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\lib\commands\migrate.js:1:1096)
Error: Invalid URL provided to HttpProvider
    at new e (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\node_modules\tronweb\dist\webpack:\src\lib\providers\HttpProvider.js:7:19)
    at Object.create (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Provider\index.js:1:1403)
    at Config.get [as provider] (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Config.js:1:6101)
    at C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\node_modules\@truffle\expect\index.js:4:18
    at Array.forEach (<anonymous>)
    at Object.options (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\node_modules\@truffle\expect\index.js:3:19)
    at Object.run (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Migrate\index.js:1:3283)
    at C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\lib\commands\migrate.js:1:1229
    at Object.needsMigrating (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\components\Migrate\index.js:1:6092)
    at runMigrations (C:\Users\wisec\AppData\Roaming\npm\node_modules\tronbox\build\lib\commands\migrate.js:1:1096)

C:\Users\wisec\.tronbox\solc\soljson_v0.5.4.js:55
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dynCall_viiiiiiiiiiiiiii=Module["dynCall_viiiiiiiiiiiiiii"]=asm["dynCall_viiiiiiiiiiiiiii"];Module["asm"]=asm;Module["cwrap"]=cwrap;Module["setValue"]=setValue;Module["Pointer_stringify"]=Pointer_stringify;Module["stringToUTF8"]=stringToUTF8;Module["lengthBytesUTF8"]=lengthBytesUTF8;Module["addFunction"]=addFunction;Module["removeFunction"]=removeFunction;if(memoryInitializer){if(!isDataURI(memoryInitializer)){memoryInitializer=locateFile(memoryInitializer)}if(ENVIRONMENT_IS_NODE||ENVIRONMENT_IS_SHELL){var data=Module["readBinary"](memoryInitializer);HEAPU8.set(data,GLOBAL_BASE)}else{addRunDependency("memory initializer");var applyMemoryInitializer=(function(data){if(data.byteLength)data=new Uint8Array(data);HEAPU8.set(data,GLOBAL_BASE);if(Module["memoryInitializerRequest"])delete Module["memoryInitializerRequest"].response;removeRunDependency("memory initializer")});function doBrowserLoad(){Module["readAsync"](memoryInitializer,applyMemoryInitializer,(function(){throw"could not load 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abort({}). Build with -s ASSERTIONS=1 for more info.
(Use `node --trace-uncaught ...` to show where the exception was thrown)