TypeError: Cannot read property 'height' of undefined

[Tommaso Celano]

TypeError: Cannot read property 'height' of undefined
at gm. (C:\Users\admin\node_modules\meme-maker\meme-maker.js:46:43)
at emitMany (events.js:127:13)
at gm.emit (events.js:204:7)
at gm. (C:\Users\admin\node_modules\gm\lib\getters.js:70:16)
at cb (C:\Users\admin\node_modules\gm\lib\command.js:322:16)
at ChildProcess. (C:\Users\admin\node_modules\gm\lib\command.js:232:9)
at emitOne (events.js:96:13)
at ChildProcess.emit (events.js:191:7)
at ChildProcess.cp.emit (C:\Users\admin\node_modules\cross-spawn\lib\enoent.js:36:37)
at Process.ChildProcess._handle.onexit (internal/child_process.js:215:12)
HOW DO I FIX THIS?

[0xDEADBEEF]

Could you paste the code that's causing the error?